diff --git a/architecture design proposal.md b/architecture design proposal.md
index 4947dac..24deedd 100755
--- a/architecture design proposal.md	
+++ b/architecture design proposal.md	
@@ -111,7 +111,7 @@ available for a given post type are greyed out in the user interface:
 
 ## Backend
 
-Currently, only one hard-coded transformer exists in [`includes/transformer/class post.php`](https://github.com/Automattic/wordpress-activitypub/blob/master/includes/transformer/class post.php).
+Currently, only one hard-coded transformer exists in `includes/transformer/class post.php` ([Source](https://github.com/Automattic/wordpress-activitypub/blob/master/includes/transformer/class-post.php)).
 
 ```php
 /**