diff --git a/nmap.spec.in b/nmap.spec.in
index 9afae905e..b730ce05d 100644
--- a/nmap.spec.in
+++ b/nmap.spec.in
@@ -13,6 +13,10 @@
 %define release 1
 %define _prefix /usr
 
+# Find where Python modules are installed. See
+# http://fedoraproject.org/wiki/Packaging/Python.
+%{!?python_sitelib: %define python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
+
 Summary: Network exploration tool and security scanner
 Name: %{name}
 Version: %{version}
@@ -83,6 +87,8 @@ gzip $RPM_BUILD_ROOT%{_mandir}/man1/* || :
 %{_datadir}/nmap
 
 %{_bindir}/ndiff
+# Ndiff is now a module and has e.g. /usr/lib/python2.4/site-packages/ndiff.py, /usr/lib/python2.4/site-packages/ndiff.pyc 
+%{python_sitelib}/ndiff*
 %doc %{_prefix}/share/man/man1/ndiff.1.gz
 
 # Ncat subpackage