diff --git a/win32ss/user/ntuser/winpos.c b/win32ss/user/ntuser/winpos.c
index 3dc4491fa09..fc59b79024f 100644
--- a/win32ss/user/ntuser/winpos.c
+++ b/win32ss/user/ntuser/winpos.c
@@ -2111,7 +2111,7 @@ co_WinPosSetWindowPos(
                 RgnType = IntGdiCombineRgn(DirtyRgn, VisAfter, 0, RGN_COPY);
              }
 
-             if (RgnType != ERROR && RgnType != NULLREGION) // Regions moved.
+             if (RgnType != ERROR && RgnType != NULLREGION && ((flags & SWP_SHOWWINDOW) || !(flags & SWP_NOZORDER))) // Regions moved.
              {
             /* old code
                 NtGdiOffsetRgn(DirtyRgn, Window->rcWindow.left, Window->rcWindow.top);