diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
index 258e1a40e6..f722836693 100644
--- a/lib/nova_plugins/functions-libvirt
+++ b/lib/nova_plugins/functions-libvirt
@@ -57,7 +57,7 @@ cgroup_device_acl = [
 EOF
     fi
 
-    if is_ubuntu; then
+    if [ "$os_VENDOR" = "Ubuntu" ]; then
         LIBVIRT_DAEMON=libvirt-bin
     else
         LIBVIRT_DAEMON=libvirtd