diff --git a/drivers/md/dm-dust.c b/drivers/md/dm-dust.c
index e739092bfc65..845f376a72d9 100644
--- a/drivers/md/dm-dust.c
+++ b/drivers/md/dm-dust.c
@@ -492,7 +492,7 @@ static struct target_type dust_target = {
 	.prepare_ioctl = dust_prepare_ioctl,
 };
 
-int __init dm_dust_init(void)
+static int __init dm_dust_init(void)
 {
 	int result = dm_register_target(&dust_target);
 
@@ -502,7 +502,7 @@ int __init dm_dust_init(void)
 	return result;
 }
 
-void __exit dm_dust_exit(void)
+static void __exit dm_dust_exit(void)
 {
 	dm_unregister_target(&dust_target);
 }