diff --git a/dlls/dwmapi/dwmapi.spec b/dlls/dwmapi/dwmapi.spec
index 8f8f7a31cbf..5f74970808f 100644
--- a/dlls/dwmapi/dwmapi.spec
+++ b/dlls/dwmapi/dwmapi.spec
@@ -28,7 +28,7 @@
 @ stdcall DwmExtendFrameIntoClientArea(long ptr)
 @ stdcall DwmFlush()
 @ stdcall DwmGetColorizationColor(ptr long)
-@ stub DwmGetCompositionTimingInfo
+@ stdcall DwmGetCompositionTimingInfo(long ptr)
 @ stdcall DwmGetGraphicsStreamClient(long ptr)
 @ stdcall DwmGetGraphicsStreamTransformHint(long ptr)
 @ stdcall DwmGetTransportAttributes(ptr ptr ptr)
diff --git a/dlls/dwmapi/dwmapi_main.c b/dlls/dwmapi/dwmapi_main.c
index 39a99188a06..e6154baa38b 100644
--- a/dlls/dwmapi/dwmapi_main.c
+++ b/dlls/dwmapi/dwmapi_main.c
@@ -208,3 +208,15 @@ HRESULT WINAPI DwmRegisterThumbnail(HWND dest, HWND src, PHTHUMBNAIL thumbnail_i
 
     return E_NOTIMPL;
 }
+
+/**********************************************************************
+ *           DwmGetCompositionTimingInfo         (DWMAPI.@)
+ */
+HRESULT WINAPI DwmGetCompositionTimingInfo(HWND hwnd, DWM_TIMING_INFO *info)
+{
+    static int i;
+
+    if(!i++) FIXME("(%p %p)\n", hwnd, info);
+
+    return E_NOTIMPL;
+}