diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 3f559c0..467a4f1 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -217,7 +217,7 @@
 	.attrs		= mtd_attrs,
 };
 
-static struct attribute_group *mtd_groups[] = {
+static const struct attribute_group *mtd_groups[] = {
 	&mtd_group,
 	NULL,
 };