diff --git a/buffer/src/main/java/io/netty/buffer/CompositeByteBuf.java b/buffer/src/main/java/io/netty/buffer/CompositeByteBuf.java
index 5de1e50b51..7a8a100438 100644
--- a/buffer/src/main/java/io/netty/buffer/CompositeByteBuf.java
+++ b/buffer/src/main/java/io/netty/buffer/CompositeByteBuf.java
@@ -1659,6 +1659,9 @@ public class CompositeByteBuf extends AbstractReferenceCountedByteBuf implements
             if (buf.nioBufferCount() == 1) {
                 return buf.nioBuffer(c.idx(index), length);
             }
+            break;
+        default:
+            break;
         }
 
         ByteBuffer[] buffers = nioBuffers(index, length);