diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index f872a99501ed..e7ea842ba3db 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -340,7 +340,7 @@ static struct attribute *mtd_attrs[] = {
 };
 ATTRIBUTE_GROUPS(mtd);
 
-static struct device_type mtd_devtype = {
+static const struct device_type mtd_devtype = {
 	.name		= "mtd",
 	.groups		= mtd_groups,
 	.release	= mtd_release,