diff --git a/docs/sources/developers/plugins/add-authentication-for-data-source-plugins.md b/docs/sources/developers/plugins/add-authentication-for-data-source-plugins.md
index 2164b771713..66f9e7bc7bc 100644
--- a/docs/sources/developers/plugins/add-authentication-for-data-source-plugins.md
+++ b/docs/sources/developers/plugins/add-authentication-for-data-source-plugins.md
@@ -36,7 +36,7 @@ Once the secure configuration has been encrypted, it can no longer be accessed f
 
 To demonstrate how you can add secrets to a data source plugin, let's add support for configuring an API key.
 
-Create a new interface in `types.go` to hold the API key.
+Create a new interface in `types.ts` to hold the API key.
 
 ```ts
 export interface MySecureJsonData {