diff --git a/inventory/group_vars/buildvm-ppc64 b/inventory/group_vars/buildvm-ppc64
index 0d1b5b0826..84915dbdec 100644
--- a/inventory/group_vars/buildvm-ppc64
+++ b/inventory/group_vars/buildvm-ppc64
@@ -6,11 +6,11 @@ mem_size: 10240
 num_cpus: 4
 ks_url: http://10.5.126.23/repo/rhel/ks/buildvm-fedora-21-ppc64
 ks_repo: http://10.5.126.23/pub/fedora-secondary/releases/21/Server/ppc64/os/
-nm: 255.255.255.0
+nm: 255.255.255.128
 gw: 10.5.124.254
 dns: 10.5.126.21
 virt_install_command: virt-install -n {{ inventory_hostname }} -r {{ mem_size }}
-                 --arch=ppc64 --graphics none --serial pty
+                 --graphics none --serial pty
                  --disk bus=virtio,path={{ volgroup }}/{{ inventory_hostname }}
                  --vcpus={{ num_cpus }}  -l {{ ks_repo }} -x
                  "ksdevice=eth0 ks={{ ks_url }} console=tty0 console=hvc0
diff --git a/inventory/group_vars/buildvm-ppc64le b/inventory/group_vars/buildvm-ppc64le
index 1781ab13ce..db32a61d58 100644
--- a/inventory/group_vars/buildvm-ppc64le
+++ b/inventory/group_vars/buildvm-ppc64le
@@ -6,11 +6,11 @@ mem_size: 10240
 num_cpus: 4
 ks_url: http://10.5.126.23/repo/rhel/ks/buildvm-fedora-21-ppc64le
 ks_repo: http://10.5.126.23/pub/fedora-secondary/releases/21/Server/ppc64le/os/
-nm: 255.255.255.0
+nm: 255.255.255.128
 gw: 10.5.124.254
 dns: 10.5.126.21
 virt_install_command: virt-install -n {{ inventory_hostname }} -r {{ mem_size }}
-                 --arch=ppc64le --graphics none --serial pty
+                 --graphics none --serial pty
                  --disk bus=virtio,path={{ volgroup }}/{{ inventory_hostname }}
                  --vcpus={{ num_cpus }}  -l {{ ks_repo }} -x
                  "ksdevice=eth0 ks={{ ks_url }} console=tty0 console=hvc0