diff --git a/plugin/account-import/src/main/java/org/zstack/identity/imports/entity/ThirdPartyAccountSourceVO.java b/plugin/account-import/src/main/java/org/zstack/identity/imports/entity/ThirdPartyAccountSourceVO.java
index 657fa643cdd..0088115c06e 100644
--- a/plugin/account-import/src/main/java/org/zstack/identity/imports/entity/ThirdPartyAccountSourceVO.java
+++ b/plugin/account-import/src/main/java/org/zstack/identity/imports/entity/ThirdPartyAccountSourceVO.java
@@ -26,7 +26,8 @@ public class ThirdPartyAccountSourceVO extends ResourceVO {
     private String description;
 
     /**
-     * ex: "ldap"
+     * ex: "WindowsAD" (exclude "Local")
+     * @see {@link org.zstack.header.identity.AccountSource}
      */
     @Column
     private String type;