diff --git a/src/AsyncMqttClient.cpp b/src/AsyncMqttClient.cpp
index 9ef5975..46784f6 100644
--- a/src/AsyncMqttClient.cpp
+++ b/src/AsyncMqttClient.cpp
@@ -134,6 +134,7 @@ AsyncMqttClient& AsyncMqttClient::setServer(const char* serviceName, const char*
     _serviceName = serviceName;
     _protocol = protocol;
 
+#ifdef ESP32
     // std::cout << "host name: " << hostName << std::endl;
     if (_hostName != "") {
         if (MDNS.begin(_hostName)) {  // Nome do host do ESP32
@@ -146,6 +147,9 @@ AsyncMqttClient& AsyncMqttClient::setServer(const char* serviceName, const char*
             }
         }
     }
+#else
+    return *this;
+#endif
 }
 
 AsyncMqttClient& AsyncMqttClient::setHostName(const char* hostName) {
diff --git a/src/AsyncMqttClient.hpp b/src/AsyncMqttClient.hpp
index 02322e7..02c7eaf 100644
--- a/src/AsyncMqttClient.hpp
+++ b/src/AsyncMqttClient.hpp
@@ -15,13 +15,13 @@
 #include <ESPmDNS.h>
 #include <Preferences.h>
 #include <freertos/semphr.h>
+#include <ESPmDNS.h>
+#include <WiFi.h>
 #elif defined(ESP8266)
 #include <ESPAsyncTCP.h>
-#include <ESPmDNS.h>
 #else
 #error Platform not supported
 #endif
-#include <WiFi.h>
 
 #if ASYNC_TCP_SSL_ENABLED
 #include <tcp_axtls.h>
@@ -106,8 +106,9 @@ class AsyncMqttClient {
     uint32_t _lastClientActivity;
     uint32_t _lastServerActivity;
     uint32_t _lastPingRequestTime;
+#ifdef ESP32
     Preferences preferences;
-
+#endif
     char _generatedClientId[18 + 1];  // esp8266-abc123 and esp32-abcdef123456
     IPAddress _ip;
     const char* _host;