diff --git a/common/transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java b/common/transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java
index 3986837..1a759bc 100644
--- a/common/transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java
+++ b/common/transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java
@@ -271,6 +271,7 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
case MqttTopics.DEVICE_RPC_RESPONSE_SUB_TOPIC:
case MqttTopics.GATEWAY_ATTRIBUTES_TOPIC:
case MqttTopics.GATEWAY_RPC_TOPIC:
+ case MqttTopics.GATEWAY_ATTRIBUTES_RESPONSE_TOPIC:
case MqttTopics.DEVICE_ATTRIBUTES_RESPONSES_TOPIC:
registerSubQoS(topic, grantedQoSList, reqQoS);
break;
diff --git a/netty-mqtt/src/main/java/org/thingsboard/mqtt/MqttClientCallback.java b/netty-mqtt/src/main/java/org/thingsboard/mqtt/MqttClientCallback.java
index 9f86b8e..000925e 100644
--- a/netty-mqtt/src/main/java/org/thingsboard/mqtt/MqttClientCallback.java
+++ b/netty-mqtt/src/main/java/org/thingsboard/mqtt/MqttClientCallback.java
@@ -15,8 +15,6 @@
*/
package org.thingsboard.mqtt;
-import io.netty.channel.ChannelId;
-
/**
* Created by Valerii Sosliuk on 12/30/2017.
*/