diff --git a/tevent.changes b/tevent.changes
index fe4134e..a9432b4 100644
--- a/tevent.changes
+++ b/tevent.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu May 31 21:33:31 UTC 2012 - lmuelle@suse.com
+
+- Define python_sitelib and python_sitearch if undefined.
+
 -------------------------------------------------------------------
 Thu May 31 12:01:45 UTC 2012 - lmuelle@suse.com
 
diff --git a/tevent.spec b/tevent.spec
index 2ff8123..417031a 100644
--- a/tevent.spec
+++ b/tevent.spec
@@ -17,6 +17,9 @@
 
 # norootforbuild
 
+%{!?python_sitelib:  %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")}
+%{!?python_sitearch:  %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib(1)")}
+
 Name:           libtevent0
 BuildRequires:  doxygen
 BuildRequires:  libtalloc-devel >= 2.0.7