(update_menu_bar): Do update if region display has changed.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index f711abded46..f341c064785 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -1250,7 +1250,10 @@ update_menu_bar (f, save_match_data)
           || !NILP (w->update_mode_line)
           || (XFASTINT (w->last_modified) < MODIFF
               && (XFASTINT (w->last_modified)
-                  <= BUF_SAVE_MODIFF (XBUFFER (w->buffer)))))
+                  <= BUF_SAVE_MODIFF (XBUFFER (w->buffer))))
+          || ((!NILP (Vtransient_mark_mode)
+               && !NILP (XBUFFER (w->buffer)->mark_active))
+              != !NILP (w->region_showing)))
         {
           struct buffer *prev = current_buffer;
           int count = specpdl_ptr - specpdl;