diff --git a/src/quickfix.c b/src/quickfix.c
index bc891bf..2adfc52 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -3286,6 +3286,7 @@
 	qf_update_win_titlevar(qi);
 
 	qf_fill_buffer(qi, buf, old_last);
+	++CHANGEDTICK(buf);
 
 	if (old_last == NULL)
 	{