diff --git a/transport/src/main/java/io/netty/channel/ChannelInboundByteHandlerAdapter.java b/transport/src/main/java/io/netty/channel/ChannelInboundByteHandlerAdapter.java
index 89f6d6a625..85aaafbe10 100644
--- a/transport/src/main/java/io/netty/channel/ChannelInboundByteHandlerAdapter.java
+++ b/transport/src/main/java/io/netty/channel/ChannelInboundByteHandlerAdapter.java
@@ -34,7 +34,7 @@ public abstract class ChannelInboundByteHandlerAdapter
             inboundBufferUpdated(ctx, in);
         } finally {
             if (!in.readable()) {
-                in.discardReadBytes();
+                in.unsafe().discardSomeReadBytes();
             }
         }
     }