diff --git a/src/share/backup/ob_log_restore_struct.cpp b/src/share/backup/ob_log_restore_struct.cpp
index eccc671626..f06fd2d898 100644
--- a/src/share/backup/ob_log_restore_struct.cpp
+++ b/src/share/backup/ob_log_restore_struct.cpp
@@ -187,6 +187,7 @@ int ObRestoreSourceServiceAttr::set_service_user_config(const char *user_tenant)
     if (OB_FAIL(databuff_printf(tmp_str, sizeof(tmp_str), "%s", user_tenant))) {
       LOG_WARN("fail to print user_tenant", K(user_tenant));
     } else if (OB_ISNULL(user_name = ::STRTOK_R(tmp_str, "@", &tenant_name))) {
+      ret = OB_ERR_UNEXPECTED;
       LOG_WARN("fail to split user_tenant", K(tmp_str));
     } else if (OB_FAIL(set_service_user(user_name, tenant_name))) {
       LOG_WARN("fail to set service user", K(user_name), K(tenant_name));