diff --git a/libraries/MySensors/core/MyGatewayTransportMQTTClient.cpp b/libraries/MySensors/core/MyGatewayTransportMQTTClient.cpp
index d43091f..7a38e88 100644
--- a/libraries/MySensors/core/MyGatewayTransportMQTTClient.cpp
+++ b/libraries/MySensors/core/MyGatewayTransportMQTTClient.cpp
@@ -32,8 +32,10 @@ IPAddress _brokerIp(MY_CONTROLLER_IP_ADDRESS);
 
 #if defined(MY_GATEWAY_ESP8266)
 	#define EthernetClient WiFiClient
-	IPAddress _gatewayIp(MY_IP_GATEWAY_ADDRESS);
-	IPAddress _subnetIp(MY_IP_SUBNET_ADDRESS);
+	#if defined(MY_IP_ADDRESS)
+ 		IPAddress _gatewayIp(MY_IP_GATEWAY_ADDRESS);
+ 		IPAddress _subnetIp(MY_IP_SUBNET_ADDRESS);
+ 	#endif
 #else
 	byte _clientMAC[] = { MY_MAC_ADDRESS };
 #endif