diff --git a/ocaml-bisect-ppx.spec b/ocaml-bisect-ppx.spec
index bf27f45..2991890 100644
--- a/ocaml-bisect-ppx.spec
+++ b/ocaml-bisect-ppx.spec
@@ -60,7 +60,7 @@ developing applications that use %{name}.
 %autosetup -n %{upname}-%{gittag}
 
 %build
-dune build
+dune build %{?_smp_mflags}
 
 # The dune rule for building documentation requires odoc.  However, odoc
 # transitively depends on this package, so we build documentation manually.