diff --git a/websocket-sharp/Ext.cs b/websocket-sharp/Ext.cs
index f0ec2d8d..4e041a13 100644
--- a/websocket-sharp/Ext.cs
+++ b/websocket-sharp/Ext.cs
@@ -894,15 +894,10 @@ namespace WebSocketSharp
       return Encoding.UTF8.GetBytes (s);
     }
 
-    internal static void WriteBytes (this Stream stream, byte[] bytes)
+    internal static void WriteBytes (this Stream stream, byte[] bytes, int bufferLength)
     {
       using (var input = new MemoryStream (bytes))
-        input.CopyTo (stream, 1024);
-    }
-
-    internal static void WriteBytes (this Stream stream, byte[] bytes, int length)
-    {
-      stream.Write (bytes, 0, length);
+        input.CopyTo (stream, bufferLength);
     }
 
     internal static void WriteBytesAsync (
@@ -1840,7 +1835,7 @@ namespace WebSocketSharp
       if (len <= Int32.MaxValue)
         output.Write (content, 0, (int) len);
       else
-        output.WriteBytes (content);
+        output.WriteBytes (content, 1024);
 
       output.Close ();
     }
diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index b4561d7f..02d61be1 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -1058,7 +1058,7 @@ namespace WebSocketSharp
         _inContinuation = true;
       }
 
-      _fragmentsBuffer.WriteBytes (frame.PayloadData.ApplicationData);
+      _fragmentsBuffer.WriteBytes (frame.PayloadData.ApplicationData, 1024);
       if (frame.IsFinal) {
         using (_fragmentsBuffer) {
           var data = _compression != CompressionMethod.None
diff --git a/websocket-sharp/WebSocketFrame.cs b/websocket-sharp/WebSocketFrame.cs
index 0eeddc08..5ff0b833 100644
--- a/websocket-sharp/WebSocketFrame.cs
+++ b/websocket-sharp/WebSocketFrame.cs
@@ -763,7 +763,7 @@ Extended Payload Length: {7}
           if (_payloadLength < 127)
             buff.Write (bytes, 0, bytes.Length);
           else
-            buff.WriteBytes (bytes);
+            buff.WriteBytes (bytes, 1024);
         }
 
         buff.Close ();