diff --git a/reactos/win32ss/gdi/gdi32/objects/region.c b/reactos/win32ss/gdi/gdi32/objects/region.c
index dd5c1287b0f..9c7e9715243 100644
--- a/reactos/win32ss/gdi/gdi32/objects/region.c
+++ b/reactos/win32ss/gdi/gdi32/objects/region.c
@@ -837,7 +837,7 @@ GetClipRgn(
     {
         /* Last error code differs from what NtGdiGetRandomRgn returns */
         SetLastError(ERROR_INVALID_PARAMETER);
-        return 0;
+        return -1;
     }
 
     Ret = NtGdiGetRandomRgn(hdc, hrgn, CLIPRGN);