Added a cross-ref to each other.
diff --git a/Doc/library/filecmp.rst b/Doc/library/filecmp.rst
index 6004214..141889e 100644
--- a/Doc/library/filecmp.rst
+++ b/Doc/library/filecmp.rst
@@ -8,7 +8,8 @@
 
 
 The :mod:`filecmp` module defines functions to compare files and directories,
-with various optional time/correctness trade-offs.
+with various optional time/correctness trade-offs. For comparing files,
+see also the :mod:`difflib` module.
 
 The :mod:`filecmp` module defines the following functions: