diff --git a/examples/MQTT/mqtt_basic_no_blk/mqtt_basic_no_blk.ino b/examples/MQTT/mqtt_basic_no_blk/mqtt_basic_no_blk.ino
index 30c66ff..fd279b3 100644
--- a/examples/MQTT/mqtt_basic_no_blk/mqtt_basic_no_blk.ino
+++ b/examples/MQTT/mqtt_basic_no_blk/mqtt_basic_no_blk.ino
@@ -48,6 +48,8 @@ IPAddress server(10, 10, 2, 2);   //The ip of the MQTT server
 char clientID[] = { "arduinoClient   " };
 
 void messageReceived(MQTTClient* client, char topic[], char payload[], int length) {
+  (void*)client;
+  (void)length;
   Serial.println("incoming: ");
   Serial.print(topic);
   Serial.print(" - ");