diff --git a/addons/oracle/values.yaml b/addons/oracle/values.yaml
index c348cac8a..474dbe9fe 100644
--- a/addons/oracle/values.yaml
+++ b/addons/oracle/values.yaml
@@ -13,7 +13,8 @@ image:
 
 exporter:
   image:
-    registry:
+    # if the value of exporter.image.registry is not specified using `--set`, it will be set to the value of 'image.registry' by default
+    registry: ""
     repository: apecloud/oracledb_exporter
     tag: 0.5.2