diff --git a/python-wheel.spec b/python-wheel.spec
index 863a363..a8b359b 100644
--- a/python-wheel.spec
+++ b/python-wheel.spec
@@ -55,6 +55,9 @@ Python 2 version.
 %package -n     python3-%{pypi_name}
 Summary:        %{summary}
 BuildRequires:  python3-devel
+# python3 bootstrap: this is rebuilt before the final build of python3, which
+# adds the dependency on python3-rpm-generators, so we require it manually
+BuildRequires:  python3-rpm-generators
 BuildRequires:  python3-setuptools
 %if %{without bootstrap}
 BuildRequires:  python3-pytest