diff --git a/inventory/group_vars/all b/inventory/group_vars/all
index 288cc34a1b..6aa997c21f 100644
--- a/inventory/group_vars/all
+++ b/inventory/group_vars/all
@@ -27,7 +27,7 @@ lvm_size: 20000
 
 # default virt install command is for a single nic-device
 # define in another group file for more nics (see buildvm)
-virt_install_command: /usr/sbin/virt-install -n ${inventory_hostname} -r ${mem_size} 
+virt_install_command: /usr/sbin/virt-install -n {{ inventory_hostname }} -r {{ mem_size }} 
                  --disk {{ volgroup }}/{{ inventory_hostname }}
                  --vcpus={{ num_cpus }}  -l {{ ks_repo }} -x 
                  "ksdevice=eth0 ks={{ ks_url }} ip={{ eth0_ip }} netmask={{ nm }}