diff --git a/src/TinyMqtt.cpp b/src/TinyMqtt.cpp
index b24d1ef..24fb984 100644
--- a/src/TinyMqtt.cpp
+++ b/src/TinyMqtt.cpp
@@ -499,11 +499,6 @@ if (mesg->type() != MqttMessage::Type::PingReq && mesg->type() != MqttMessage::T
 					if (callback and isSubscribedTo(published))
 					{
 						callback(this, published, payload, len);	// TODO send the real payload
-
-						mesg->changeType(MqttMessage::Type::PubAck);	// TODO constness design but saves memory & speed 
-						// TODO re-add packet identifier if any
-						mesg->sendTo(this);
-						mesg->changeType(MqttMessage::Type::Publish);	// mesg is const (...)
 					}
 				}
 				else if (parent) // from outside to inside
diff --git a/src/TinyMqtt.h b/src/TinyMqtt.h
index 6119bae..723d24e 100644
--- a/src/TinyMqtt.h
+++ b/src/TinyMqtt.h
@@ -145,7 +145,7 @@ class MqttClient
 		{ if (client) client->write(buf, length); }
 
 		const std::string& id() const { return clientId; }
-		// void id(std::string& new_id) { clientId = new_id; }
+		void id(std::string& new_id) { clientId = new_id; }
 
 		/** Should be called in main loop() */
 		void loop();