diff --git a/docs/howto/custom-template-tags.txt b/docs/howto/custom-template-tags.txt
index a72dbdd50a..30ef76d208 100644
--- a/docs/howto/custom-template-tags.txt
+++ b/docs/howto/custom-template-tags.txt
@@ -79,8 +79,8 @@ an application.
 .. admonition:: Behind the scenes
 
     For a ton of examples, read the source code for Django's default filters
-    and tags. They're in ``django/template/defaultfilters.py`` and
-    ``django/template/defaulttags.py``, respectively.
+    and tags. They're in :source:`django/template/defaultfilters.py` and
+    :source:`django/template/defaulttags.py`, respectively.
 
     For more information on the :ttag:`load` tag, read its documentation.