diff --git a/transport/src/main/java/io/netty/channel/pool/FixedChannelPool.java b/transport/src/main/java/io/netty/channel/pool/FixedChannelPool.java
index a8b249c243..8483ca9997 100644
--- a/transport/src/main/java/io/netty/channel/pool/FixedChannelPool.java
+++ b/transport/src/main/java/io/netty/channel/pool/FixedChannelPool.java
@@ -34,7 +34,7 @@ import java.util.concurrent.TimeoutException;
  * {@link ChannelPool} implementation that takes another {@link ChannelPool} implementation and enforce a maximum
  * number of concurrent connections.
  */
-public final class FixedChannelPool extends SimpleChannelPool {
+public class FixedChannelPool extends SimpleChannelPool {
     private static final IllegalStateException FULL_EXCEPTION = ThrowableUtil.unknownStackTrace(
             new IllegalStateException("Too many outstanding acquire operations"),
             FixedChannelPool.class, "acquire0(...)");