diff --git a/reactos/subsys/win32k/ntuser/painting.c b/reactos/subsys/win32k/ntuser/painting.c
index acfcf845aa8..0f8d1c9cdbb 100644
--- a/reactos/subsys/win32k/ntuser/painting.c
+++ b/reactos/subsys/win32k/ntuser/painting.c
@@ -995,7 +995,7 @@ NtUserGetUpdateRect(HWND hWnd, LPRECT UnsafeRect, BOOL bErase)
       }
    }
 
-   RETURN(Window->UpdateRegion != NULL);
+   RETURN(!IntGdiIsEmptyRect(&Rect));
 
 CLEANUP:
    DPRINT("Leave NtUserGetUpdateRect, ret=%i\n",_ret_);