diff --git a/ocaml-gsl.spec b/ocaml-gsl.spec
index 93238ae..3e8cee7 100644
--- a/ocaml-gsl.spec
+++ b/ocaml-gsl.spec
@@ -3,7 +3,7 @@
 
 Name:           ocaml-gsl
 Version:        0.6.0
-Release:        12%{?dist}
+Release:        13%{?dist}
 Summary:        Interface to GSL (GNU scientific library) for OCaml
 
 Group:          Development/Libraries
@@ -103,6 +103,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Sat Jan 07 2012 Richard W.M. Jones <rjones@redhat.com> - 0.6.0-13
+- Rebuild for OCaml 3.12.1.
+
 * Tue Feb 08 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.6.0-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild