diff --git a/drivers/power/reset/reboot-mode.c b/drivers/power/reset/reboot-mode.c
index 9aa7b809972c..09f1bc353087 100644
--- a/drivers/power/reset/reboot-mode.c
+++ b/drivers/power/reset/reboot-mode.c
@@ -36,7 +36,7 @@ static int get_reboot_mode_magic(struct reboot_mode_driver *reboot,
 	int magic = 0;
 	struct mode_info *info;
 
-	if (!cmd)
+	if (!cmd || !cmd[0])
 		cmd = normal;
 
 	list_for_each_entry(info, &reboot->head, list) {