diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index cc915073a753..894df6020f6a 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -528,7 +528,7 @@ update:
 	}
 
 	return !(mcast_data.flags &
-		 (BATADV_MCAST_WANT_ALL_IPV4 + BATADV_MCAST_WANT_ALL_IPV6));
+		 (BATADV_MCAST_WANT_ALL_IPV4 | BATADV_MCAST_WANT_ALL_IPV6));
 }
 
 /**