win32ss/user/ntuser/painting.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/win32ss/user/ntuser/painting.c b/win32ss/user/ntuser/painting.c
index eb2815c644..1a96550a27 100644
--- a/win32ss/user/ntuser/painting.c
+++ b/win32ss/user/ntuser/painting.c
@@ -300,7 +300,7 @@ IntGetNCUpdateRgn(PWND Window, BOOL Validate)
          GreDeleteObject(hRgnWindow);
          GreDeleteObject(hRgnNonClient);
          Window->state &= ~WNDS_UPDATEDIRTY;
-         return NULL;
+         return HRGN_WINDOW;
       }
 
       /*