diff --git a/ESPWebThingAdapter.h b/ESPWebThingAdapter.h
index fa1b331..e701c9d 100644
--- a/ESPWebThingAdapter.h
+++ b/ESPWebThingAdapter.h
@@ -72,7 +72,9 @@ class WebThingAdapter {
   }
 
   void update() {
+#ifdef ESP8266
     MDNS.update();
+#endif
   }
 
   void addDevice(ThingDevice* device) {