diff --git a/src/apps/mdns/mdns.c b/src/apps/mdns/mdns.c
index a21bb783..9fe3c5c5 100644
--- a/src/apps/mdns/mdns.c
+++ b/src/apps/mdns/mdns.c
@@ -1814,6 +1814,7 @@ mdns_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr,
 
 #if LWIP_IPV6
   if (IP_IS_V6(ip_current_dest_addr())) {
+    /* instead of having one 'v6group' per netif, just compare zoneless here */
     if (!ip_addr_cmp_zoneless(ip_current_dest_addr(), &v6group)) {
       packet.recv_unicast = 1;
     }