diff --git a/zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java b/zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java
index 874592e1248..cef17432643 100644
--- a/zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java
+++ b/zookeeper-server/src/main/java/org/apache/zookeeper/ClientCnxn.java
@@ -1175,6 +1175,7 @@ private void logStartConnect(InetSocketAddress addr) {
         }
 
         @Override
+        @SuppressFBWarnings("JLM_JSR166_UTILCONCURRENT_MONITORENTER")
         public void run() {
             clientCnxnSocket.introduce(this, sessionId, outgoingQueue);
             clientCnxnSocket.updateNow();
@@ -1645,6 +1646,7 @@ public Packet queuePacket(
         return queuePacket(h, r, request, response, cb, clientPath, serverPath, ctx, watchRegistration, null);
     }
 
+    @SuppressFBWarnings("JLM_JSR166_UTILCONCURRENT_MONITORENTER")
     public Packet queuePacket(
         RequestHeader h,
         ReplyHeader r,