diff --git a/activemq-core/src/main/java/org/apache/activemq/ConnectionAudit.java b/activemq-core/src/main/java/org/apache/activemq/ConnectionAudit.java
index 8ff4b95754..d07b92b141 100644
--- a/activemq-core/src/main/java/org/apache/activemq/ConnectionAudit.java
+++ b/activemq-core/src/main/java/org/apache/activemq/ConnectionAudit.java
@@ -64,7 +64,7 @@ class ConnectionAudit {
         return false;
     }
 
-    protected void rollbackDuplicate(ActiveMQDispatcher dispatcher, Message message) {
+    protected synchronized void rollbackDuplicate(ActiveMQDispatcher dispatcher, Message message) {
         if (checkForDuplicates && message != null) {
             ActiveMQDestination destination = message.getDestination();
             if (destination != null) {