More source links.
diff --git a/Doc/library/timeit.rst b/Doc/library/timeit.rst
index 4a0b9c2..a03e40e 100644
--- a/Doc/library/timeit.rst
+++ b/Doc/library/timeit.rst
@@ -9,6 +9,10 @@
single: Benchmarking
single: Performance
+**Source code:** :source:`Lib/timeit.py`
+
+--------------
+
This module provides a simple way to time small bits of Python code. It has both
command line as well as callable interfaces. It avoids a number of common traps
for measuring execution times. See also Tim Peters' introduction to the