More source links
diff --git a/Doc/library/imghdr.rst b/Doc/library/imghdr.rst
index 0c0722d..32ec9cf 100644
--- a/Doc/library/imghdr.rst
+++ b/Doc/library/imghdr.rst
@@ -4,6 +4,9 @@
 .. module:: imghdr
    :synopsis: Determine the type of image contained in a file or byte stream.
 
+**Source code:** :source:`Lib/imghdr.py`
+
+--------------
 
 The :mod:`imghdr` module determines the type of image contained in a file or
 byte stream.