diff --git a/obs-service-replace_using_package_version.spec b/obs-service-replace_using_package_version.spec
index f9d2795..f859e9a 100644
--- a/obs-service-replace_using_package_version.spec
+++ b/obs-service-replace_using_package_version.spec
@@ -29,6 +29,8 @@ Source0:        %{service}.py
 Source1:        %{service}.service
 Source2:        LICENSE
 BuildRequires:  sed
+# for the __python3 macro
+BuildRequires:  python-rpm-macros
 Requires:       python3-docopt
 Requires:       python3-rpm
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build