diff --git a/inventory/group_vars/ec2 b/inventory/group_vars/ec2
index 5f338c8fdb..450f1b3578 100644
--- a/inventory/group_vars/ec2
+++ b/inventory/group_vars/ec2
@@ -3,3 +3,6 @@ ansible_ssh_user: fedora
 ansible_become: true
 ansible_become_user: root
 ansible_become_method: sudo
+
+# Disable ethX ifcfg, let amazon handle these via DHCP.
+ansible_ifcfg_whitelist: ['eth0', 'eth1', 'eth2', 'eth3']