diff --git a/compat-flex.spec b/compat-flex.spec
index 209d88a..75b3373 100644
--- a/compat-flex.spec
+++ b/compat-flex.spec
@@ -1,7 +1,7 @@
 Summary: Legacy version of flex, a tool for creating scanners
 Name: compat-flex
 Version: 2.5.4a
-Release: 11%{?dist}
+Release: 12%{?dist}
 License: BSD
 Group: Development/Tools
 URL: http://www.gnu.org/software/flex/
@@ -96,6 +96,9 @@ rm -rf ${RPM_BUILD_ROOT}
 %{_infodir}/flex-%{version}.info*
 
 %changelog
+* Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.5.4a-12
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
+
 * Fri Aug 16 2013 Petr Machata <pmachata@redhat.com> - 2.5.4a-11
 - Fix "raising the section level of @section" bug that texinfo 5.0
   complains about (flex-2.5.4a-texinfo-section.patch)