diff --git a/ocaml-rpm-macros.changes b/ocaml-rpm-macros.changes
index c2d5498..d1360f2 100644
--- a/ocaml-rpm-macros.changes
+++ b/ocaml-rpm-macros.changes
@@ -2,6 +2,7 @@
 Tue Feb 22 22:22:22 UTC 2022 - ohering@suse.de
 
 - remove usage of external-lib-deps for dune3
+- define ocaml_dune_bootstrap_directory for dune3
 
 -------------------------------------------------------------------
 Wed Oct 27 07:31:27 UTC 2021 - ohering@suse.de
diff --git a/ocaml-rpm-macros.spec b/ocaml-rpm-macros.spec
index ab485a8..3a2a803 100644
--- a/ocaml-rpm-macros.spec
+++ b/ocaml-rpm-macros.spec
@@ -424,6 +424,7 @@ ocaml setup.ml -configure \\\
 %%ocaml_oasis_test \
 	ocaml setup.ml -test
 #
+%%ocaml_dune_bootstrap_directory %%{_libexecdir}/dune-bootstrap
 %%ocaml_dune_setup \
 %ifarch ppc64 ppc64le
 	ulimit -s $((1024 * 64)) ; \