diff --git a/python-ruamel-yaml.spec b/python-ruamel-yaml.spec
index 9b8de79..951097a 100644
--- a/python-ruamel-yaml.spec
+++ b/python-ruamel-yaml.spec
@@ -1,3 +1,4 @@
+%global _with_bootstrap 1
 # Breaks the circular dependency with ruamel.yaml.clib.
 %bcond_with bootstrap