diff --git a/win/win32/mswproc.c b/win/win32/mswproc.c
index 4e675671f..141a4e96f 100644
--- a/win/win32/mswproc.c
+++ b/win/win32/mswproc.c
@@ -1852,6 +1852,7 @@ void
 mswin_delay_output()
 {
     logDebug("mswin_delay_output()\n");
+    mswin_map_update(mswin_hwnd_from_winid(WIN_MAP));
     Sleep(50);
 }