diff --git a/artemis-jms-server/src/main/java/org/apache/activemq/artemis/jms/server/config/impl/ConnectionFactoryConfigurationImpl.java b/artemis-jms-server/src/main/java/org/apache/activemq/artemis/jms/server/config/impl/ConnectionFactoryConfigurationImpl.java
index ae71ecaa8d..c2ac0b6ad0 100644
--- a/artemis-jms-server/src/main/java/org/apache/activemq/artemis/jms/server/config/impl/ConnectionFactoryConfigurationImpl.java
+++ b/artemis-jms-server/src/main/java/org/apache/activemq/artemis/jms/server/config/impl/ConnectionFactoryConfigurationImpl.java
@@ -640,7 +640,7 @@ public class ConnectionFactoryConfigurationImpl implements ConnectionFactoryConf
 
       deserializationWhiteList = BufferHelper.readNullableSimpleStringAsString(buffer);
 
-      enable1xPrefixes = buffer.readableBytes() > 0 ? buffer.readBoolean() : null;
+      enable1xPrefixes = buffer.readableBytes() > 0 ? buffer.readBoolean() : ActiveMQClient.DEFAULT_ENABLE_1X_PREFIXES;
 
       enableSharedClientID = buffer.readableBytes() > 0 ? buffer.readBoolean() : ActiveMQClient.DEFAULT_ENABLED_SHARED_CLIENT_ID;