diff --git a/codec/src/main/java/io/netty/handler/codec/ReplayingDecoderBuffer.java b/codec/src/main/java/io/netty/handler/codec/ReplayingDecoderBuffer.java
index 8a1ba745b1..d780a4ec95 100644
--- a/codec/src/main/java/io/netty/handler/codec/ReplayingDecoderBuffer.java
+++ b/codec/src/main/java/io/netty/handler/codec/ReplayingDecoderBuffer.java
@@ -466,7 +466,9 @@ final class ReplayingDecoderBuffer implements ByteBuf {
 
     @Override
     public ByteBuf readBytes(ByteBuf dst) {
-        throw new UnreplayableOperationException();
+        checkReadableBytes(dst.writableBytes());
+        buffer.readBytes(dst);
+        return this;
     }
 
     @Override