diff --git a/include/ddraw.h b/include/ddraw.h
index 8ecf7b8b466..a7648b1b632 100644
--- a/include/ddraw.h
+++ b/include/ddraw.h
@@ -2275,7 +2275,7 @@ DECLARE_INTERFACE_(IDirectDrawSurface4,IUnknown)
     STDMETHOD(BltFast)(THIS_ DWORD dwX, DWORD dwY, LPDIRECTDRAWSURFACE4 lpDDSrcSurface, LPRECT lpSrcRect, DWORD dwTrans) PURE;
     STDMETHOD(DeleteAttachedSurface)(THIS_ DWORD dwFlags, LPDIRECTDRAWSURFACE4 lpDDSAttachedSurface) PURE;
     STDMETHOD(EnumAttachedSurfaces)(THIS_ LPVOID lpContext, LPDDENUMSURFACESCALLBACK2 lpEnumSurfacesCallback) PURE;
-    STDMETHOD(EnumOverlayZOrders)(THIS_ DWORD dwFlags, LPVOID lpContext, LPDDENUMSURFACESCALLBACK lpfnCallback) PURE;
+    STDMETHOD(EnumOverlayZOrders)(THIS_ DWORD dwFlags, LPVOID lpContext, LPDDENUMSURFACESCALLBACK2 lpfnCallback) PURE;
     STDMETHOD(Flip)(THIS_ LPDIRECTDRAWSURFACE4 lpDDSurfaceTargetOverride, DWORD dwFlags) PURE;
     STDMETHOD(GetAttachedSurface)(THIS_ LPDDSCAPS2 lpDDSCaps, LPDIRECTDRAWSURFACE4 *lplpDDAttachedSurface) PURE;
     STDMETHOD(GetBltStatus)(THIS_ DWORD dwFlags) PURE;