diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 2c5ed5c..1745764 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -1333,7 +1333,7 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 	p = &mtd_dev_param[mtd_devs];
 	strcpy(&p->name[0], tokens[0]);
 
-	if (tokens[1])
+	if (tokens[1] && *tokens[1] != '\0')
 		p->vid_hdr_offs = bytes_str_to_int(tokens[1]);
 
 	if (p->vid_hdr_offs < 0)