diff --git a/block/blk-crypto-sysfs.c b/block/blk-crypto-sysfs.c
index 55268ed..a304434 100644
--- a/block/blk-crypto-sysfs.c
+++ b/block/blk-crypto-sysfs.c
@@ -116,7 +116,7 @@ static void blk_crypto_release(struct kobject *kobj)
 	kfree(container_of(kobj, struct blk_crypto_kobj, kobj));
 }
 
-static struct kobj_type blk_crypto_ktype = {
+static const struct kobj_type blk_crypto_ktype = {
 	.default_groups = blk_crypto_attr_groups,
 	.sysfs_ops	= &blk_crypto_attr_ops,
 	.release	= blk_crypto_release,