diff --git a/ocaml-ocamlgraph.spec b/ocaml-ocamlgraph.spec
index 8e6e7d3..7d34f7f 100644
--- a/ocaml-ocamlgraph.spec
+++ b/ocaml-ocamlgraph.spec
@@ -17,7 +17,7 @@
 
 Name:           ocaml-ocamlgraph
 Version:        1.8.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        OCaml library for arc and node graphs
 
 Group:          Development/Libraries
@@ -129,6 +129,9 @@ cp -p doc/* %{buildroot}%{_defaultdocdir}/%{name}-%{version}-devel/API/
 
 
 %changelog
+* Fri Jul 20 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.8.1-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
+
 * Mon Jun 11 2012 Richard W.M. Jones <rjones@redhat.com> - 1.8.1-3
 - Rebuild for OCaml 4.00.0.