diff -u b/amp.module b/amp.module
--- b/amp.module
+++ b/amp.module
@@ -262,7 +262,7 @@
 }
 
 /**
- * Tracking visibility check for pages.
+ * Implements hook_google_analytics_visibility_pages().
  *
  * Depending on whether the active route is an AMP one, this function returns
  * TRUE if JS code should be added to the current page, otherwise FALSE.