diff --git a/src/org/redkale/convert/Factory.java b/src/org/redkale/convert/Factory.java
index 4c500b59c..5985dfae8 100644
--- a/src/org/redkale/convert/Factory.java
+++ b/src/org/redkale/convert/Factory.java
@@ -11,6 +11,7 @@ import java.util.Map;
 import java.lang.reflect.*;
 import java.math.BigInteger;
 import java.net.*;
+import java.nio.channels.*;
 import static org.redkale.convert.ext.InetAddressSimpledCoder.*;
 import java.util.*;
 import java.util.concurrent.*;
@@ -90,6 +91,7 @@ public abstract class Factory<R extends Reader, W extends Writer> {
             this.register(Class.class, TypeSimpledCoder.instance);
             this.register(InetSocketAddress.class, InetSocketAddressSimpledCoder.instance);
             this.register(Pattern.class, PatternSimpledCoder.instance);
+            this.register(CompletionHandler.class, CompletionHandlerSimpledCoder.instance);
             //---------------------------------------------------------
             this.register(boolean[].class, BoolArraySimpledCoder.instance);
             this.register(byte[].class, ByteArraySimpledCoder.instance);
diff --git a/src/org/redkale/convert/ext/CompletionHandlerSimpledCoder.java b/src/org/redkale/convert/ext/CompletionHandlerSimpledCoder.java
new file mode 100644
index 000000000..180c7a5ca
--- /dev/null
+++ b/src/org/redkale/convert/ext/CompletionHandlerSimpledCoder.java
@@ -0,0 +1,33 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.redkale.convert.ext;
+
+import java.nio.channels.*;
+import org.redkale.convert.*;
+
+/**
+ * 
+ * @see http://www.redkale.org
+ * @author zhangjx
+ * @param <R>
+ * @param <W>
+ */
+public class CompletionHandlerSimpledCoder<R extends Reader, W extends Writer> extends SimpledCoder<R, W, CompletionHandler> {
+
+    public static final CompletionHandlerSimpledCoder instance = new CompletionHandlerSimpledCoder();
+
+    @Override
+    public void convertTo(W out, CompletionHandler value) {
+        out.writeNull();
+    }
+
+    @Override
+    public CompletionHandler convertFrom(R in) {
+        in.readObjectB();
+        return null;
+    }
+
+}