diff --git a/inventory/group_vars/releng-compose b/inventory/group_vars/releng-compose
index 644ee62eb5..9106e9d6f8 100644
--- a/inventory/group_vars/releng-compose
+++ b/inventory/group_vars/releng-compose
@@ -31,6 +31,8 @@ koji_server_url: "https://koji.fedoraproject.org/kojihub"
 koji_weburl: "https://koji.fedoraproject.org/koji"
 koji_topurl: "https://kojipkgs.fedoraproject.org/"
 
+ansible_python_interpreter: /usr/bin/python3
+
 # These are consumed by a task in roles/fedmsg/base/main.yml
 fedmsg_certs:
 - service: shell