diff --git a/ocaml-ancient.spec b/ocaml-ancient.spec
index a36e274..45f6e6a 100644
--- a/ocaml-ancient.spec
+++ b/ocaml-ancient.spec
@@ -4,7 +4,7 @@
 
 Name:           ocaml-ancient
 Version:        0.9.0
-Release:        20%{?dist}
+Release:        21%{?dist}
 Summary:        OCaml library for large memory structures and sharing
 License:        LGPLv2+ with exceptions
 
@@ -105,6 +105,9 @@ chrpath --delete $OCAMLFIND_DESTDIR/stublibs/dll*.so
 
 
 %changelog
+* Wed Jun 17 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.9.0-21
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
+
 * Tue Feb 17 2015 Richard W.M. Jones <rjones@redhat.com> - 0.9.0-20
 - ocaml-4.02.1 rebuild.