diff --git a/bootstrapvz/providers/azure/tasks/udev.py b/bootstrapvz/providers/azure/tasks/udev.py
index f1e4b1d..10bc3d4 100644
--- a/bootstrapvz/providers/azure/tasks/udev.py
+++ b/bootstrapvz/providers/azure/tasks/udev.py
@@ -1,7 +1,7 @@
 from bootstrapvz.base import Task
 from bootstrapvz.common import phases
 from bootstrapvz.common.tasks import kernel
-import subprocess
+from bootstrapvz.common.tools import log_check_call
 import os.path
 from . import assets
 
@@ -16,4 +16,4 @@ class PatchUdev(Task):
 		# c.f. http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?id=61e055638cea
 		with open(os.path.join(assets, 'udev.diff')) as diff_file:
 			udev_dir = os.path.join(info.root, 'usr/share/initramfs-tools/scripts/init-top')
-			subprocess.call(['patch', '--no-backup-if-mismatch', '-p6', '-d' + udev_dir], stdin=diff_file)
+			log_check_call(['patch', '--no-backup-if-mismatch', '-p6', '-d' + udev_dir], stdin=diff_file)