diff --git a/reactos/include/psdk/d3d9.h b/reactos/include/psdk/d3d9.h
index 83839fef5a9..8758e282b00 100644
--- a/reactos/include/psdk/d3d9.h
+++ b/reactos/include/psdk/d3d9.h
@@ -1710,7 +1710,7 @@ DECLARE_INTERFACE_(IDirect3DDevice9Ex,IDirect3DDevice9)
     STDMETHOD(CreateQuery)(THIS_ D3DQUERYTYPE Type, IDirect3DQuery9** ppQuery) PURE;
     /* IDirect3DDevice9Ex methods */
     STDMETHOD(SetConvolutionMonoKernel)(THIS_ UINT width, UINT height, float *rows, float *columns) PURE;
-    STDMETHOD(ComposeRects)(THIS_ IDirect3DSurface9 *pSrc, IDirect3DDevice9 *pDst, IDirect3DVertexBuffer9 *pSrcRectDescs, UINT NumRects, IDirect3DVertexBuffer9 *pDstRectDescs, D3DCOMPOSERECTSOP Operation, int Xoffset, int Yoffset) PURE;
+    STDMETHOD(ComposeRects)(THIS_ IDirect3DSurface9 *pSrc, IDirect3DSurface9 *pDst, IDirect3DVertexBuffer9 *pSrcRectDescs, UINT NumRects, IDirect3DVertexBuffer9 *pDstRectDescs, D3DCOMPOSERECTSOP Operation, int Xoffset, int Yoffset) PURE;
     STDMETHOD(PresentEx)(THIS_ CONST RECT *pSourceRect, CONST RECT *pDestRect, HWND hDestWindowOverride, CONST RGNDATA *pDirtyRegion, DWORD dwFlags) PURE;
     STDMETHOD(GetGPUThreadPriority)(THIS_ INT *pPriority) PURE;
     STDMETHOD(SetGPUThreadPriority)(THIS_ INT Priority) PURE;