diff --git a/ci-automation/vms.sh b/ci-automation/vms.sh
index 69f8fd5462..f796df6a83 100644
--- a/ci-automation/vms.sh
+++ b/ci-automation/vms.sh
@@ -127,8 +127,10 @@ function _vm_build_impl() {
     for format in ${formats}; do
         echo " ###################  VENDOR '${format}' ################### "
         COMPRESSION_FORMAT="bz2"
-        if [[ "${format}" =~ ^(openstack|openstack_mini|digitalocean)$ ]];then
+        if [[ "${format}" =~ ^(openstack_mini|digitalocean)$ ]];then
             COMPRESSION_FORMAT="gz,bz2"
+        elif [[ "${format}" =~ ^(openstack)$ ]];then
+            COMPRESSION_FORMAT="gz,bz2,none"
         elif [[ "${format}" =~ ^(qemu|qemu_uefi)$ ]];then
             COMPRESSION_FORMAT="bz2,none"
         fi