diff --git a/reactos/include/psdk/wingdi.h b/reactos/include/psdk/wingdi.h
index 052b04be334..c9e0b9e610e 100644
--- a/reactos/include/psdk/wingdi.h
+++ b/reactos/include/psdk/wingdi.h
@@ -3110,6 +3110,7 @@ int WINAPI GetTextFaceA(HDC,int,LPSTR);
 int WINAPI GetTextFaceW(HDC,int,LPWSTR);
 BOOL WINAPI GetTextMetricsA(HDC,LPTEXTMETRICA);
 BOOL WINAPI GetTextMetricsW(HDC,LPTEXTMETRICW);
+BOOL WINAPI GetTransform(HDC,DWORD,XFORM*);
 BOOL WINAPI GetViewportExtEx(HDC,LPSIZE);
 BOOL WINAPI GetViewportOrgEx(HDC,LPPOINT);
 BOOL WINAPI GetWindowExtEx(HDC,LPSIZE);