diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnAckDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnAckDecoder.java
index 6100e70a..2775585f 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnAckDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnAckDecoder.java
@@ -16,7 +16,7 @@ class ConnAckDecoder extends DemuxDecoder {
         in.resetReaderIndex();
         //Common decoding part
         ConnAckMessage message = new ConnAckMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnectDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnectDecoder.java
index e296270c..bc7760dc 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnectDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/ConnectDecoder.java
@@ -46,7 +46,7 @@ public class ConnectDecoder extends DemuxDecoder {
         in.resetReaderIndex();
         //Common decoding part
         ConnectMessage message = new ConnectMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/DisconnectDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/DisconnectDecoder.java
index 63cca6f6..8bf8cd9f 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/DisconnectDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/DisconnectDecoder.java
@@ -31,7 +31,7 @@ class DisconnectDecoder extends DemuxDecoder {
         //Common decoding part
         in.resetReaderIndex();
         DisconnectMessage message = new DisconnectMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/MessageIDDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/MessageIDDecoder.java
index 55cd8134..650f1f53 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/MessageIDDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/MessageIDDecoder.java
@@ -33,7 +33,7 @@ abstract class MessageIDDecoder extends DemuxDecoder {
         in.resetReaderIndex();
         //Common decoding part
         MessageIDMessage message = createMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingReqDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingReqDecoder.java
index 2e2c7789..ddb1c4ab 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingReqDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingReqDecoder.java
@@ -31,7 +31,7 @@ class PingReqDecoder extends DemuxDecoder {
         //Common decoding part
         in.resetReaderIndex();
         PingReqMessage message = new PingReqMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingRespDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingRespDecoder.java
index 025a6901..54b6cf74 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingRespDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PingRespDecoder.java
@@ -31,7 +31,7 @@ class PingRespDecoder extends DemuxDecoder {
         //Common decoding part
         in.resetReaderIndex();
         PingRespMessage message = new PingRespMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PubRelDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PubRelDecoder.java
index 10b53341..509c6fd7 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PubRelDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/PubRelDecoder.java
@@ -17,7 +17,6 @@ package org.dna.mqtt.moquette.parser.netty;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
-import io.netty.handler.codec.CorruptedFrameException;
 import io.netty.util.AttributeMap;
 import java.io.UnsupportedEncodingException;
 import java.util.List;
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubAckDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubAckDecoder.java
index b0d89595..d2f4c5cf 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubAckDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubAckDecoder.java
@@ -32,7 +32,7 @@ class SubAckDecoder extends DemuxDecoder {
         //Common decoding part
         in.resetReaderIndex();
         SubAckMessage message = new SubAckMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x00, in)) {
             in.resetReaderIndex();
             return;
         }
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubscribeDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubscribeDecoder.java
index 034d856d..0830d43b 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubscribeDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/SubscribeDecoder.java
@@ -34,11 +34,10 @@ class SubscribeDecoder extends DemuxDecoder {
         //Common decoding part
         SubscribeMessage message = new SubscribeMessage();
         in.resetReaderIndex();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x02, in)) {
             in.resetReaderIndex();
             return;
         }
-        //TODO check reserved fixed flags = b0010
         
         //check qos level
         if (message.getQos() != QOSType.LEAST_ONE) {
diff --git a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/UnsubscribeDecoder.java b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/UnsubscribeDecoder.java
index 15ecb6f3..b8f751b7 100644
--- a/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/UnsubscribeDecoder.java
+++ b/netty_parser/src/main/java/org/dna/mqtt/moquette/parser/netty/UnsubscribeDecoder.java
@@ -33,7 +33,7 @@ class UnsubscribeDecoder extends DemuxDecoder {
         //Common decoding part
         in.resetReaderIndex();
         UnsubscribeMessage message = new UnsubscribeMessage();
-        if (!decodeCommonHeader(message, in)) {
+        if (!decodeCommonHeader(message, 0x02, in)) {
             in.resetReaderIndex();
             return;
         }