diff --git a/autoconf213.spec b/autoconf213.spec
index 4c5323b..0a208ce 100644
--- a/autoconf213.spec
+++ b/autoconf213.spec
@@ -1,7 +1,7 @@
 Summary:    A GNU tool for automatically configuring source code
 Name:       autoconf213
 Version:    2.13
-Release:    20%{?dist}
+Release:    21%{?dist}
 License:    GPLv2+ and MIT
 Group:      Development/Tools
 URL:        http://www.gnu.org/software/autoconf/
@@ -90,6 +90,9 @@ rm -rf ${RPM_BUILD_ROOT}
 %doc AUTHORS COPYING NEWS README TODO
 
 %changelog
+* Mon Feb 07 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.13-21
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild
+
 * Fri Jul 24 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.13-20
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild