diff --git a/examples/starlark-configmap-as-functionconfig/set-replicas.star b/examples/starlark-configmap-as-functionconfig/set-replicas.star
index c172efa04..9fb332374 100644
--- a/examples/starlark-configmap-as-functionconfig/set-replicas.star
+++ b/examples/starlark-configmap-as-functionconfig/set-replicas.star
@@ -3,5 +3,7 @@ def setReplicas(resources, replicas):
         if r["apiVersion"] == "apps/v1" and r["kind"] == "Deployment":
             r["spec"]["replicas"] = replicas
 
-replicas = ctx.resource_list["functionConfig"]["data"]["replicas"]
+# The functionConfig is a ConfigMap, so the replicas we got from field
+# functionConfig.data.replicas is a string. We nned to convert it to a int.
+replicas = int(ctx.resource_list["functionConfig"]["data"]["replicas"])
 setReplicas(ctx.resource_list["items"], replicas)