diff --git a/ocaml-rpm-macros.spec b/ocaml-rpm-macros.spec
index 0bedcfc..1c01e28 100644
--- a/ocaml-rpm-macros.spec
+++ b/ocaml-rpm-macros.spec
@@ -354,7 +354,6 @@ ocaml setup.ml -configure \\\
 	if dune runtest \\\
 		--verbose \\\
 		${dune_for_release} \\\
-		%%{?_smp_mflags} \\\
 		$OCAML_DUNE_RUNTEST_ARGS ; \
 	then \
 		echo "dune runtest succeeded" ; \