diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 437a9fdb67f5..8add0f45aa52 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1411,7 +1411,7 @@ int __init ip6_mr_init(void)
 	return err;
 }
 
-void ip6_mr_cleanup(void)
+void __init ip6_mr_cleanup(void)
 {
 	rtnl_unregister_many(ip6mr_rtnl_msg_handlers);
 #ifdef CONFIG_IPV6_PIMSM_V2