1 files changed, 3 insertions, 2 deletions

diff --git a/dmenu.c b/dmenu.c
index 085dc29..19f6385 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -415,8 +415,9 @@ keypress(XKeyEvent *ev)
         switch(ksym) {
         default:
 insert:
-                if (!iscntrl(*buf))
-                        insert(buf, len);
+                if (iscntrl((unsigned char)*buf))
+                        return;
+                insert(buf, len);
                 break;
         case XK_Delete:
         case XK_KP_Delete: