diff --git a/client/src/main/java/org/apache/rocketmq/client/ClientConfig.java b/client/src/main/java/org/apache/rocketmq/client/ClientConfig.java
index 79cb04af1d0..c5b5f77113f 100644
--- a/client/src/main/java/org/apache/rocketmq/client/ClientConfig.java
+++ b/client/src/main/java/org/apache/rocketmq/client/ClientConfig.java
@@ -427,6 +427,7 @@ public String getNamespaceV2() {
 
     public void setNamespaceV2(String namespaceV2) {
         this.namespaceV2 = namespaceV2;
+        this.namespace = namespaceV2;
     }
 
     public AccessChannel getAccessChannel() {