diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 2348176401a0b19ad3b5e9129999381f43da50a0..d8a95755a8a89e2ab99c22b16ea56f339c8229b9 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -1058,6 +1058,8 @@ int __init rfcomm_init_sockets(void)
 {
 	int err;
 
+	BUILD_BUG_ON(sizeof(struct sockaddr_rc) > sizeof(struct sockaddr));
+
 	err = proto_register(&rfcomm_proto, 0);
 	if (err < 0)
 		return err;