diff --git a/dlls/dwmapi/dwmapi_main.c b/dlls/dwmapi/dwmapi_main.c
index 1fb522e389a..1a65410c7eb 100644
--- a/dlls/dwmapi/dwmapi_main.c
+++ b/dlls/dwmapi/dwmapi_main.c
@@ -92,7 +92,7 @@ HRESULT WINAPI DwmFlush(void)
 
     if (!once++) FIXME("() stub\n");
 
-    return E_NOTIMPL;
+    return S_OK;
 }
 
 /**********************************************************************