diff --git a/common/ubuntu_cleanup.sh b/common/ubuntu_cleanup.sh
index f043e26..4eb9c7f 100644
--- a/common/ubuntu_cleanup.sh
+++ b/common/ubuntu_cleanup.sh
@@ -15,6 +15,7 @@
 
 echo "cleaning up dhcp leases"
 rm -rf /var/lib/dhcp/* || true
+rm -rf /var/lib/ntp/ntp.conf.dhcp || true
 
 echo "cleaning up udev rules"
 rm -f /etc/udev/rules.d/70-persistent-net.rules || true