diff --git a/0install.spec b/0install.spec
index d5506d7..610e51f 100644
--- a/0install.spec
+++ b/0install.spec
@@ -25,6 +25,7 @@ BuildRequires:  ocaml-lablgtk-devel
 BuildRequires:  ocaml-lwt-devel
 # not packaged yet, optional
 # BuildRequires:  ocaml-obus-devel
+BuildRequires:  ocaml-ocamlbuild
 BuildRequires:  ocaml-ounit-devel
 BuildRequires:  ocaml-ssl-devel
 BuildRequires:  ocaml-xmlm-devel
@@ -171,6 +172,7 @@ fi
 %changelog
 * Mon Nov 07 2016 Richard W.M. Jones <rjones@redhat.com> - 2.11-2
 - Rebuild for OCaml 4.04.0.
+- Add explicit dependency on ocamlbuild.
 
 * Mon Feb 22 2016 Ding-Yi Chen <dchen@redhat.com> - 2.11-1
 - Upstream update to 2.11.