diff --git a/ocaml-cppo.changes b/ocaml-cppo.changes
index 560bd06..a39765a 100644
--- a/ocaml-cppo.changes
+++ b/ocaml-cppo.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Nov  9 09:29:20 UTC 2015 - hpj@urpla.net
+
+- don't use make -jN for build
+- require ocaml explicitly for build
+
 -------------------------------------------------------------------
 Sat Jan  3 18:52:35 UTC 2015 - hpj@urpla.net
 
diff --git a/ocaml-cppo.spec b/ocaml-cppo.spec
index 2cf2404..0ffb667 100644
--- a/ocaml-cppo.spec
+++ b/ocaml-cppo.spec
@@ -24,6 +24,7 @@ Summary:	The C preprocessor written in OCaml
 Url:		http://mjambon.com/cppo.html
 Group:		Development/Libraries/Other
 Source:		http://mjambon.com/releases/cppo/cppo-%{version}.tar.gz
+BuildRequires:	ocaml
 BuildRequires:	ocaml-easy-format
 BuildRequires:	ocaml-findlib
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
@@ -45,7 +46,7 @@ robustness of cppo across OCaml versions.
 %setup -qn cppo-%{version}
 
 %build
-make %{?_smp_mflags}
+make
 
 %install
 export OCAMLFIND_DESTDIR=%{buildroot}$(ocamlfind printconf destdir)