diff --git a/win32ss/user/ntuser/winpos.c b/win32ss/user/ntuser/winpos.c
index b5927d183c..0926099baa 100644
--- a/win32ss/user/ntuser/winpos.c
+++ b/win32ss/user/ntuser/winpos.c
@@ -1909,6 +1909,7 @@ co_WinPosSetWindowPos(
           (Window->spwndOwner->ExStyle & WS_EX_TOOLWINDOW))
       {
          if (UserIsDesktopWindow(Window->spwndParent) &&
+             Window->spwndOwner == NULL &&
              (!(Window->ExStyle & WS_EX_TOOLWINDOW) ||
               (Window->ExStyle & WS_EX_APPWINDOW)))
          {