diff --git a/bison.changes b/bison.changes
index fc9a7cf..17b8f41 100644
--- a/bison.changes
+++ b/bison.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Mar 21 07:52:06 UTC 2013 - mmeister@suse.com
+
+- Added url as source.
+  Please see http://en.opensuse.org/SourceUrls
+
 -------------------------------------------------------------------
 Wed Feb  6 06:11:30 UTC 2013 - adrian@suse.com
 
diff --git a/bison.spec b/bison.spec
index d38b092..64b93bb 100644
--- a/bison.spec
+++ b/bison.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package bison
 #
-# Copyright (c) 2012 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,8 +17,9 @@
 
 
 Name:           bison
+BuildRequires:  flex
 BuildRequires:  gcc-c++
-BuildRequires:  xz flex
+BuildRequires:  xz
 Requires(pre):  %install_info_prereq
 # bug437293
 %ifarch ppc64
@@ -30,7 +31,7 @@ Summary:        The GNU Parser Generator
 License:        GPL-3.0+
 Group:          Development/Languages/C and C++
 Url:            http://www.gnu.org/software/bison/bison.html
-Source:         bison-%{version}.tar.xz
+Source:         http://ftp.gnu.org/gnu/bison/bison-%{version}.tar.xz
 Source2:        baselibs.conf
 Requires:       m4
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build