More source links
diff --git a/Doc/library/mailcap.rst b/Doc/library/mailcap.rst
index 0a0a790..4bb31bf 100644
--- a/Doc/library/mailcap.rst
+++ b/Doc/library/mailcap.rst
@@ -4,6 +4,9 @@
 .. module:: mailcap
    :synopsis: Mailcap file handling.
 
+**Source code:** :source:`Lib/mailcap.py`
+
+--------------
 
 Mailcap files are used to configure how MIME-aware applications such as mail
 readers and Web browsers react to files with different MIME types. (The name