diff --git a/polymake.spec b/polymake.spec
index bf67560..df045d6 100644
--- a/polymake.spec
+++ b/polymake.spec
@@ -11,7 +11,7 @@
 
 Name:           polymake
 Version:        2.13
-Release:        17%{?gitdate:.git%{gitdate}}%{?dist}
+Release:        18%{?gitdate:.git%{gitdate}}%{?dist}
 Summary:        Algorithms on convex polytopes and polyhedra
 
 License:        GPLv2+
@@ -260,6 +260,9 @@ sed -i 's,%{buildroot},,' %{buildroot}%{polydir}/bundled/singular/conf.make
 %doc doc/*
 
 %changelog
+* Wed Feb 04 2015 Petr Machata <pmachata@redhat.com> - 2.13-18.git20141013
+- Bump for rebuild.
+
 * Mon Feb  2 2015 Jerry James <loganjerry@gmail.com> - 2.13-17.git20141013
 - Rebuild for eigen3 3.2.4, lrslib 0.5.1, and normaliz 2.12.2