diff --git a/include/net/ip.h b/include/net/ip.h
index d9a0e74d8923..fb63371c07a8 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -338,7 +338,7 @@ static inline int sk_mc_loop(struct sock *sk)
 		return inet6_sk(sk)->mc_loop;
 #endif
 	}
-	__WARN();
+	WARN_ON(1);
 	return 1;
 }