diff --git a/libraries/MySensors/MySensor.cpp b/libraries/MySensors/MySensor.cpp
index b953fd7..010cd19 100644
--- a/libraries/MySensors/MySensor.cpp
+++ b/libraries/MySensors/MySensor.cpp
@@ -483,7 +483,7 @@ void MySensor::sendBatteryLevel(uint8_t value, bool enableAck) {
 	sendRoute(build(msg, nc.nodeId, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_BATTERY_LEVEL, enableAck).set(value));
 }
 
-void MySensor::present(uint8_t childSensorId, uint8_t sensorType, bool enableAck, const char*description) {
+void MySensor::present(uint8_t childSensorId, uint8_t sensorType, const char*description, bool enableAck) {
 	sendRoute(build(msg, nc.nodeId, GATEWAY_ADDRESS, childSensorId, C_PRESENTATION, sensorType, enableAck).set(childSensorId==NODE_SENSOR_ID?LIBRARY_VERSION:description));
 }
 
diff --git a/libraries/MySensors/MySensor.h b/libraries/MySensors/MySensor.h
index 1cda7d1..8842a6f 100644
--- a/libraries/MySensors/MySensor.h
+++ b/libraries/MySensors/MySensor.h
@@ -177,10 +177,10 @@ class MySensor
 	*
 	* @param sensorId Select a unique sensor id for this sensor. Choose a number between 0-254.
 	* @param sensorType The sensor type. See sensor typedef in MyMessage.h.
-	* @param ack Set this to true if you want destination node to send ack back to this node. Default is not to request any ack.
 	* @param description A textual description of the sensor.
+	* @param ack Set this to true if you want destination node to send ack back to this node. Default is not to request any ack.
 	*/
-	void present(uint8_t sensorId, uint8_t sensorType, bool ack=false, const char *description="");
+	void present(uint8_t sensorId, uint8_t sensorType, const char *description="", bool ack=false);
 
 	/**
 	 * Sends sketch meta information to the gateway. Not mandatory but a nice thing to do.