diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 35cc5f54886030e630c8e3513f6aac998b8a31e2..a3990505abdf84c48715bddc6e7ea43b48c38725 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2200,6 +2200,9 @@ static int __init console_setup(char *str)
 	char *s, *options, *brl_options = NULL;
 	int idx;
 
+	if (str[0] == 0)
+		return 1;
+
 	if (_braille_console_setup(&str, &brl_options))
 		return 1;