diff --git a/codec/src/main/java/io/netty/handler/codec/CodecUtil.java b/codec/src/main/java/io/netty/handler/codec/CodecUtil.java
index ee057cd122..b4bd073a3a 100644
--- a/codec/src/main/java/io/netty/handler/codec/CodecUtil.java
+++ b/codec/src/main/java/io/netty/handler/codec/CodecUtil.java
@@ -4,7 +4,7 @@ import io.netty.buffer.ChannelBuffer;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.NoSuchBufferException;
 
-class CodecUtil {
+final class CodecUtil {
 
     static boolean unfoldAndAdd(
             ChannelHandlerContext ctx, Object msg, boolean inbound) throws Exception {