diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index c037702..284be30 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -6621,7 +6621,9 @@
     void
 gui_mch_update(void)
 {
-    while (g_main_context_pending(NULL) && !vim_is_input_buf_full())
+    int cnt = 0;	// prevent endless loop
+    while (g_main_context_pending(NULL) && !vim_is_input_buf_full()
+								&& ++cnt < 100)
 	g_main_context_iteration(NULL, TRUE);
 }