diff --git a/jetty-websocket/websocket-core/src/main/java/org/eclipse/jetty/websocket/core/internal/ExtensionStack.java b/jetty-websocket/websocket-core/src/main/java/org/eclipse/jetty/websocket/core/internal/ExtensionStack.java
index eff21089020..52ec3df0af1 100644
--- a/jetty-websocket/websocket-core/src/main/java/org/eclipse/jetty/websocket/core/internal/ExtensionStack.java
+++ b/jetty-websocket/websocket-core/src/main/java/org/eclipse/jetty/websocket/core/internal/ExtensionStack.java
@@ -235,7 +235,7 @@ public class ExtensionStack implements IncomingFrames, OutgoingFrames, Dumpable
     @Override
     public String dumpSelf()
     {
-        return String.format("%s@%x[size=%d,queueSize=%d]", getClass().getSimpleName(), hashCode(), extensions.size(), getQueueSize());
+        return String.format("%s@%x[size=%d]", getClass().getSimpleName(), hashCode(), extensions.size());
     }
 
     @Override