diff --git a/src/apps/mdns/mdns.c b/src/apps/mdns/mdns.c
index 0001ca2e..1df92c3f 100644
--- a/src/apps/mdns/mdns.c
+++ b/src/apps/mdns/mdns.c
@@ -2514,7 +2514,7 @@ mdns_resp_netif_active(struct netif *netif)
 s8_t
 mdns_resp_add_service(struct netif *netif, const char *name, const char *service, enum mdns_sd_proto proto, u16_t port, service_get_txt_fn_t txt_fn, void *txt_data, char **subTypes,  u8_t subtypes_nbr )
 {
-  u8_t slot;
+  u8_t slot,i;
   struct mdns_service *srv;
   struct mdns_host *mdns;
 
diff --git a/src/apps/mdns/mdns_out.c b/src/apps/mdns/mdns_out.c
index d18f17a5..b470667c 100644
--- a/src/apps/mdns/mdns_out.c
+++ b/src/apps/mdns/mdns_out.c
@@ -54,7 +54,7 @@
 
 /* Function prototypes */
 static void mdns_clear_outmsg(struct mdns_outmsg *outmsg);
-mdns_add_service_subtype_ptr_answer(struct mdns_outpacket *reply, struct mdns_outmsg *msg, struct mdns_service *service);
+static err_t mdns_add_service_subtype_ptr_answer(struct mdns_outpacket *reply, struct mdns_outmsg *msg, struct mdns_service *service);
 /**
  * Call user supplied function to setup TXT data
  * @param service The service to build TXT record for
diff --git a/src/include/lwip/apps/mdns_opts.h b/src/include/lwip/apps/mdns_opts.h
index 48e0958e..03e5ff55 100644
--- a/src/include/lwip/apps/mdns_opts.h
+++ b/src/include/lwip/apps/mdns_opts.h
@@ -52,7 +52,7 @@
  * transport. IGMP is needed for IPv4 multicast.
  */
 #ifndef LWIP_MDNS_RESPONDER
-#define LWIP_MDNS_RESPONDER             0
+#define LWIP_MDNS_RESPONDER             1
 #endif /* LWIP_MDNS_RESPONDER */
 
 /** The maximum number of services per netif */