diff --git a/kernel/printk.c b/kernel/printk.c
index 6ff2615..b2ebaee 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -210,7 +210,7 @@
 
 #ifdef CONFIG_BOOT_PRINTK_DELAY
 
-static unsigned int boot_delay; /* msecs delay after each printk during bootup */
+static int boot_delay; /* msecs delay after each printk during bootup */
 static unsigned long long loops_per_msec;	/* based on boot_delay */
 
 static int __init boot_delay_setup(char *str)