diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index 3da9f39..1551600 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -790,9 +790,9 @@
 
 /* Initialize 6pack control device -- register 6pack line discipline */
 
-static char msg_banner[]  __initdata = KERN_INFO \
+static const char msg_banner[]  __initdata = KERN_INFO \
 	"AX.25: 6pack driver, " SIXPACK_VERSION "\n";
-static char msg_regfail[] __initdata = KERN_ERR  \
+static const char msg_regfail[] __initdata = KERN_ERR  \
 	"6pack: can't register line discipline (err = %d)\n";
 
 static int __init sixpack_init_driver(void)