diff --git a/cmf.spec b/cmf.spec
index 4c8b754..3e92ce9 100644
--- a/cmf.spec
+++ b/cmf.spec
@@ -3,7 +3,7 @@
 Version: 	1.3.1
 Release: 	1
 URL: 		http://cmf.zope.org
-Source0: 	http://cmf.zope.org/download/CMF-1.3.1/%{name}-%{version}.tgz
+Source0: 	http://cmf.zope.org/download/CMF-1.3.1/%{name}-%{version}.tar.gz
 License: 	Zope Public License (ZPL) Version 2.0
 Group: 		Development/Web Applications
 BuildRoot: 	%{_tmppath}/%{name}-root