diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
index 70ccd8c9d29..9e4eec24c84 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
@@ -115,7 +115,7 @@ public class ZKRMStateStore extends RMStateStore {
   private List<ACL> zkAcl;
   private List<ZKUtil.ZKAuthInfo> zkAuths;
 
-  class ZKSyncOperationCallback implements AsyncCallback.VoidCallback {
+  static class ZKSyncOperationCallback implements AsyncCallback.VoidCallback {
     @Override
     public void processResult(int rc, String path, Object ctx){
       if (rc == Code.OK.intValue()) {