diff --git a/vars/global.yml b/vars/global.yml
index 160d2b4013..4f68949152 100644
--- a/vars/global.yml
+++ b/vars/global.yml
@@ -70,3 +70,5 @@ global_pkgs_inst: ['bind-utils', 'mailx', 'nc', 'openssh-clients',
 # Set up variables for various files to make sure we don't forget to use.
 repoSpanner_rpms_http: 8445
 repoSpanner_ansible_http: 8443
+
+ansible_python_interpreter: !!null