diff --git a/dlls/cfgmgr32/cfgmgr32.spec b/dlls/cfgmgr32/cfgmgr32.spec
index 69b35f6a86d..3d687b39f87 100644
--- a/dlls/cfgmgr32/cfgmgr32.spec
+++ b/dlls/cfgmgr32/cfgmgr32.spec
@@ -53,7 +53,7 @@
 @ stub CM_Get_Class_Name_ExA
 @ stub CM_Get_Class_Name_ExW
 @ stdcall CM_Get_Class_Registry_PropertyA(ptr long ptr ptr long long ptr) setupapi.CM_Get_Class_Registry_PropertyA
-@ stub CM_Get_Class_Registry_PropertyW
+@ stdcall CM_Get_Class_Registry_PropertyW(ptr long ptr ptr long long ptr) setupapi.CM_Get_Class_Registry_PropertyW
 @ stub CM_Get_Depth
 @ stub CM_Get_Depth_Ex
 @ stub CM_Get_DevNode_Registry_PropertyA
diff --git a/dlls/setupapi/setupapi.spec b/dlls/setupapi/setupapi.spec
index 5c8fd802572..d3825d9a2ef 100644
--- a/dlls/setupapi/setupapi.spec
+++ b/dlls/setupapi/setupapi.spec
@@ -64,7 +64,7 @@
 @ stub CM_Get_Class_Name_ExA
 @ stub CM_Get_Class_Name_ExW
 @ stdcall CM_Get_Class_Registry_PropertyA(ptr long ptr ptr long long ptr)
-@ stub CM_Get_Class_Registry_PropertyW
+@ stdcall CM_Get_Class_Registry_PropertyW(ptr long ptr ptr long long ptr)
 @ stub CM_Get_Depth
 @ stub CM_Get_Depth_Ex
 @ stub CM_Get_DevNode_Registry_PropertyA
diff --git a/dlls/setupapi/stubs.c b/dlls/setupapi/stubs.c
index 41f6d2f7189..ba437b78061 100644
--- a/dlls/setupapi/stubs.c
+++ b/dlls/setupapi/stubs.c
@@ -397,6 +397,16 @@ CONFIGRET WINAPI CM_Get_Class_Registry_PropertyA(LPGUID class, ULONG prop, PULON
     return CR_FAILURE;
 }
 
+/***********************************************************************
+ *      CM_Get_Class_Registry_PropertyW (SETUPAPI.@)
+ */
+CONFIGRET WINAPI CM_Get_Class_Registry_PropertyW(LPGUID class, ULONG prop, PULONG regdatatype,
+                                                 PVOID buf, ULONG len, ULONG flags, HMACHINE machine)
+{
+    FIXME("%p %u %p %p %u 0x%08x %p: stub\n", class, prop, regdatatype, buf, len, flags, machine);
+    return CR_FAILURE;
+}
+
 /***********************************************************************
  *      CM_Set_Class_Registry_PropertyA (SETUPAPI.@)
  */