diff --git a/python-toml.spec b/python-toml.spec
index ceb9a4d..82d769d 100644
--- a/python-toml.spec
+++ b/python-toml.spec
@@ -17,6 +17,10 @@ Source0:        %{pypi_source}
 BuildArch:      noarch
 
 BuildRequires:  python%{python3_pkgversion}-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
+# Note that the package prefix is always python3-, even if we build for 3.X
+BuildRequires:  python3-rpm-generators
 BuildRequires:  pyproject-rpm-macros
 
 %bcond_without tests