1 files changed, 5 insertions, 0 deletions
diff --git a/src/cmd.c b/src/cmd.c
index b46ba84..7cf3e80 100644
--- a/src/cmd.c
+++ b/src/cmd.c
@@ -479,6 +479,11 @@ int cmd_process(struct commands *commands, struct cmd_ctx **ctxp, char key,
 	if (!commands)
 		return EINVAL;
 
+	if (key == KEYCODE_NONE) {
+		warning("cmd: process: illegal keycode NONE\n");
+		return EINVAL;
+	}
+
 	/* are we in edit-mode? */
 	if (ctxp && *ctxp) {