diff --git a/ocaml-fileutils.spec b/ocaml-fileutils.spec
index 73e3e0a..e77d365 100644
--- a/ocaml-fileutils.spec
+++ b/ocaml-fileutils.spec
@@ -18,6 +18,7 @@ BuildRequires:  ocaml-ocamldoc
 %if 0%{?fedora} || 0%{?rhel} <= 6
 BuildRequires:  ocaml-ounit-devel
 %endif
+BuildRequires:  ocaml-ocamlbuild
 
 
 %description
@@ -98,6 +99,7 @@ make test
 %changelog
 * Fri Nov 04 2016 Richard W.M. Jones <rjones@redhat.com> - 0.5.1-1
 - New upstream version 0.5.1.
+- Add explicit dependency on ocamlbuild.
 
 * Mon Sep 12 2016 Dan Horák <dan[at]danny.cz> - 0.4.5-17
 - disable debuginfo subpackage on interpreted builds