diff --git a/transport/src/main/java/io/netty/channel/DefaultChannelPipeline.java b/transport/src/main/java/io/netty/channel/DefaultChannelPipeline.java
index 34cd6f8044..bdcc992a7d 100755
--- a/transport/src/main/java/io/netty/channel/DefaultChannelPipeline.java
+++ b/transport/src/main/java/io/netty/channel/DefaultChannelPipeline.java
@@ -1468,6 +1468,7 @@ public class DefaultChannelPipeline implements ChannelPipeline {
         public ChannelBuf newOutboundBuffer(ChannelHandlerContext ctx) throws Exception {
             switch (channel.metadata().bufferType()) {
             case BYTE:
+                // TODO: Use a direct buffer once buffer pooling is implemented.
                 return Unpooled.buffer();
             case MESSAGE:
                 return Unpooled.messageBuffer();