diff --git a/jib-gradle-plugin/README.md b/jib-gradle-plugin/README.md
index 5c4001018d..9647fa40ee 100644
--- a/jib-gradle-plugin/README.md
+++ b/jib-gradle-plugin/README.md
@@ -511,6 +511,7 @@ jib {
   from {
     image = 'aws_account_id.dkr.ecr.region.amazonaws.com/my-base-image'
     credHelper = 'ecr-login'
+    // For Kotlin build files, use setCredHelper("ecr-login")
   }
   to {
     image = 'gcr.io/my-gcp-project/my-app'