diff --git a/src/include/lwip/apps/mdns_opts.h b/src/include/lwip/apps/mdns_opts.h
index 1eee3e38..48e0958e 100644
--- a/src/include/lwip/apps/mdns_opts.h
+++ b/src/include/lwip/apps/mdns_opts.h
@@ -58,6 +58,8 @@
 /** The maximum number of services per netif */
 #ifndef MDNS_MAX_SERVICES
 #define MDNS_MAX_SERVICES               1
+/** The maximum number of subtypes per service */
+#define MDNS_MAX_SERVICES_SUBTYPES      4
 #endif
 
 /** The minimum delay between probes in ms. RFC 6762 require 250ms.
diff --git a/src/include/lwip/apps/mdns_priv.h b/src/include/lwip/apps/mdns_priv.h
index 5209ba00..1576531b 100644
--- a/src/include/lwip/apps/mdns_priv.h
+++ b/src/include/lwip/apps/mdns_priv.h
@@ -98,14 +98,18 @@ struct mdns_service {
   char name[MDNS_LABEL_MAXLEN + 1];
   /** Type of service, like '_http' */
   char service[MDNS_LABEL_MAXLEN + 1];
-  /** Callback function and userdata
-   * to update txtdata buffer */
+  /** SubType of service, like '_printer' */
+  char subTypes[MDNS_MAX_SERVICES_SUBTYPES][MDNS_LABEL_MAXLEN + 1];
+  /** Callback function and userdata/*
+   /* to update txtdata buffer */
   service_get_txt_fn_t txt_fn;
   void *txt_userdata;
   /** Protocol, TCP or UDP */
   u16_t proto;
   /** Port of the service */
   u16_t port;
+  /** Number of the subtypes of a service */
+  u16_t subtypes_nbr;
 };
 
 /** mDNS output packet */