diff --git a/activemq-core/src/main/java/org/apache/activemq/TransactionContext.java b/activemq-core/src/main/java/org/apache/activemq/TransactionContext.java
index f2d11b65ee..164c19ba86 100755
--- a/activemq-core/src/main/java/org/apache/activemq/TransactionContext.java
+++ b/activemq-core/src/main/java/org/apache/activemq/TransactionContext.java
@@ -65,7 +65,7 @@ public class TransactionContext implements XAResource {
     private static final Log LOG = LogFactory.getLog(TransactionContext.class);
 
     // XATransactionId -> ArrayList of TransactionContext objects
-    private static final ConcurrentHashMap<TransactionId, List<TransactionContext>> ENDED_XA_TRANSACTION_CONTEXTS = new ConcurrentHashMap<TransactionId, List<TransactionContext>>();
+    private final ConcurrentHashMap<TransactionId, List<TransactionContext>> ENDED_XA_TRANSACTION_CONTEXTS = new ConcurrentHashMap<TransactionId, List<TransactionContext>>();
 
     private final ActiveMQConnection connection;
     private final LongSequenceGenerator localTransactionIdGenerator;