diff --git a/dlls/d3dx9_24/d3dx9_24.spec b/dlls/d3dx9_24/d3dx9_24.spec
index 0dcca427aed..cfe26cec7b4 100644
--- a/dlls/d3dx9_24/d3dx9_24.spec
+++ b/dlls/d3dx9_24/d3dx9_24.spec
@@ -280,7 +280,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_25/d3dx9_25.spec b/dlls/d3dx9_25/d3dx9_25.spec
index 7975803499e..7f18290aa2c 100644
--- a/dlls/d3dx9_25/d3dx9_25.spec
+++ b/dlls/d3dx9_25/d3dx9_25.spec
@@ -280,7 +280,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_26/d3dx9_26.spec b/dlls/d3dx9_26/d3dx9_26.spec
index 1d7b8028df8..d0f6c9d54ff 100644
--- a/dlls/d3dx9_26/d3dx9_26.spec
+++ b/dlls/d3dx9_26/d3dx9_26.spec
@@ -284,7 +284,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_27/d3dx9_27.spec b/dlls/d3dx9_27/d3dx9_27.spec
index 1d7b8028df8..d0f6c9d54ff 100644
--- a/dlls/d3dx9_27/d3dx9_27.spec
+++ b/dlls/d3dx9_27/d3dx9_27.spec
@@ -284,7 +284,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_28/d3dx9_28.spec b/dlls/d3dx9_28/d3dx9_28.spec
index 083667caa01..6ddb4f4c4c9 100644
--- a/dlls/d3dx9_28/d3dx9_28.spec
+++ b/dlls/d3dx9_28/d3dx9_28.spec
@@ -289,7 +289,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_29/d3dx9_29.spec b/dlls/d3dx9_29/d3dx9_29.spec
index 083667caa01..6ddb4f4c4c9 100644
--- a/dlls/d3dx9_29/d3dx9_29.spec
+++ b/dlls/d3dx9_29/d3dx9_29.spec
@@ -289,7 +289,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_30/d3dx9_30.spec b/dlls/d3dx9_30/d3dx9_30.spec
index eb39c0f4140..e2060a6c179 100644
--- a/dlls/d3dx9_30/d3dx9_30.spec
+++ b/dlls/d3dx9_30/d3dx9_30.spec
@@ -289,7 +289,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_31/d3dx9_31.spec b/dlls/d3dx9_31/d3dx9_31.spec
index 1667a51013d..6b8d8cfe93e 100644
--- a/dlls/d3dx9_31/d3dx9_31.spec
+++ b/dlls/d3dx9_31/d3dx9_31.spec
@@ -286,7 +286,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_32/d3dx9_32.spec b/dlls/d3dx9_32/d3dx9_32.spec
index f1c4b627a51..3318b6ee5a7 100644
--- a/dlls/d3dx9_32/d3dx9_32.spec
+++ b/dlls/d3dx9_32/d3dx9_32.spec
@@ -291,7 +291,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_33/d3dx9_33.spec b/dlls/d3dx9_33/d3dx9_33.spec
index f1c4b627a51..3318b6ee5a7 100644
--- a/dlls/d3dx9_33/d3dx9_33.spec
+++ b/dlls/d3dx9_33/d3dx9_33.spec
@@ -291,7 +291,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_34/d3dx9_34.spec b/dlls/d3dx9_34/d3dx9_34.spec
index f1c4b627a51..3318b6ee5a7 100644
--- a/dlls/d3dx9_34/d3dx9_34.spec
+++ b/dlls/d3dx9_34/d3dx9_34.spec
@@ -291,7 +291,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_35/d3dx9_35.spec b/dlls/d3dx9_35/d3dx9_35.spec
index f1c4b627a51..3318b6ee5a7 100644
--- a/dlls/d3dx9_35/d3dx9_35.spec
+++ b/dlls/d3dx9_35/d3dx9_35.spec
@@ -291,7 +291,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_36/d3dx9_36.spec b/dlls/d3dx9_36/d3dx9_36.spec
index 575d0ca6728..aa99dd210be 100644
--- a/dlls/d3dx9_36/d3dx9_36.spec
+++ b/dlls/d3dx9_36/d3dx9_36.spec
@@ -293,7 +293,7 @@
 @ stub D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr)
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr)
 @ stub D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr)
-@ stub D3DXTessellateNPatches(ptr ptr long long ptr ptr)
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr)
 @ stub D3DXTessellateRectPatch(ptr ptr ptr ptr ptr)
 @ stub D3DXTessellateTriPatch(ptr ptr ptr ptr ptr)
 @ stub D3DXTriPatchSize(ptr ptr ptr)
diff --git a/dlls/d3dx9_36/mesh.c b/dlls/d3dx9_36/mesh.c
index 4aeac266b7b..f1fe4efe6d0 100644
--- a/dlls/d3dx9_36/mesh.c
+++ b/dlls/d3dx9_36/mesh.c
@@ -7266,3 +7266,12 @@ HRESULT WINAPI D3DXIntersect(ID3DXBaseMesh *mesh, const D3DXVECTOR3 *ray_pos, co
 
     return E_NOTIMPL;
 }
+
+HRESULT WINAPI D3DXTessellateNPatches(ID3DXMesh *mesh, const DWORD *adjacency_in, float num_segs,
+        BOOL quadratic_normals, ID3DXMesh **mesh_out, ID3DXBuffer **adjacency_out)
+{
+    FIXME("mesh %p, adjacency_in %p, num_segs %f, quadratic_normals %d, mesh_out %p, adjacency_out %p stub.\n",
+            mesh, adjacency_in, num_segs, quadratic_normals, mesh_out, adjacency_out);
+
+    return E_NOTIMPL;
+}
diff --git a/dlls/d3dx9_37/d3dx9_37.spec b/dlls/d3dx9_37/d3dx9_37.spec
index 324855e51a0..d58fabad1cd 100644
--- a/dlls/d3dx9_37/d3dx9_37.spec
+++ b/dlls/d3dx9_37/d3dx9_37.spec
@@ -293,7 +293,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_38/d3dx9_38.spec b/dlls/d3dx9_38/d3dx9_38.spec
index 324855e51a0..d58fabad1cd 100644
--- a/dlls/d3dx9_38/d3dx9_38.spec
+++ b/dlls/d3dx9_38/d3dx9_38.spec
@@ -293,7 +293,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_39/d3dx9_39.spec b/dlls/d3dx9_39/d3dx9_39.spec
index 324855e51a0..d58fabad1cd 100644
--- a/dlls/d3dx9_39/d3dx9_39.spec
+++ b/dlls/d3dx9_39/d3dx9_39.spec
@@ -293,7 +293,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_40/d3dx9_40.spec b/dlls/d3dx9_40/d3dx9_40.spec
index 324855e51a0..d58fabad1cd 100644
--- a/dlls/d3dx9_40/d3dx9_40.spec
+++ b/dlls/d3dx9_40/d3dx9_40.spec
@@ -293,7 +293,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_41/d3dx9_41.spec b/dlls/d3dx9_41/d3dx9_41.spec
index 324855e51a0..d58fabad1cd 100644
--- a/dlls/d3dx9_41/d3dx9_41.spec
+++ b/dlls/d3dx9_41/d3dx9_41.spec
@@ -293,7 +293,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_42/d3dx9_42.spec b/dlls/d3dx9_42/d3dx9_42.spec
index 324855e51a0..d58fabad1cd 100644
--- a/dlls/d3dx9_42/d3dx9_42.spec
+++ b/dlls/d3dx9_42/d3dx9_42.spec
@@ -293,7 +293,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize
diff --git a/dlls/d3dx9_43/d3dx9_43.spec b/dlls/d3dx9_43/d3dx9_43.spec
index 9da1640398b..687972eb37f 100644
--- a/dlls/d3dx9_43/d3dx9_43.spec
+++ b/dlls/d3dx9_43/d3dx9_43.spec
@@ -286,7 +286,7 @@
 @ stdcall D3DXSimplifyMesh(ptr ptr ptr ptr long long ptr) d3dx9_36.D3DXSimplifyMesh
 @ stdcall D3DXSphereBoundProbe(ptr float ptr ptr) d3dx9_36.D3DXSphereBoundProbe
 @ stdcall D3DXSplitMesh(ptr ptr long long ptr ptr ptr ptr ptr) d3dx9_36.D3DXSplitMesh
-@ stdcall D3DXTessellateNPatches(ptr ptr long long ptr ptr) d3dx9_36.D3DXTessellateNPatches
+@ stdcall D3DXTessellateNPatches(ptr ptr float long ptr ptr) d3dx9_36.D3DXTessellateNPatches
 @ stdcall D3DXTessellateRectPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateRectPatch
 @ stdcall D3DXTessellateTriPatch(ptr ptr ptr ptr ptr) d3dx9_36.D3DXTessellateTriPatch
 @ stdcall D3DXTriPatchSize(ptr ptr ptr) d3dx9_36.D3DXTriPatchSize