diff --git a/nbdkit.spec b/nbdkit.spec
index 2606d73..9358b2e 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -6,7 +6,7 @@
 
 Name:           nbdkit
 Version:        1.1.12
-Release:        12%{?dist}
+Release:        13%{?dist}
 Summary:        NBD server
 
 License:        BSD
@@ -480,6 +480,9 @@ popd
 
 
 %changelog
+* Sat Aug 19 2017 Richard W.M. Jones <rjones@redhat.com> - 1.1.12-13
+- Rebuild for OCaml 4.05.0.
+
 * Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.1.12-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild