diff --git a/dokku b/dokku
index 3b5822440..16fd8dc5a 100755
--- a/dokku
+++ b/dokku
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -eo pipefail
+shopt -s nullglob
 
 export DOKKU_DISTRO=${DOKKU_DISTRO:="ubuntu"}
 export DOKKU_IMAGE=${DOKKU_IMAGE:="progrium/buildstep"}