diff --git a/win32ss/user/ntuser/painting.c b/win32ss/user/ntuser/painting.c
index e0e4893a4b0..46d3b5d9331 100644
--- a/win32ss/user/ntuser/painting.c
+++ b/win32ss/user/ntuser/painting.c
@@ -978,7 +978,7 @@ co_UserRedrawWindow(
     */
 
    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT) &&
-       TmpRgn != NULL)
+       TmpRgn != NULL && (Flags & RDW_UPDATENOW) == 0 )
    {
       IntInvalidateWindows(Window, TmpRgn, Flags);
    }