diff --git a/setup.sh b/setup.sh
index 9bcc4aa..613339c 100755
--- a/setup.sh
+++ b/setup.sh
@@ -53,7 +53,7 @@ cd ../..
 # copy a couple of other files
 cp -a docker.key \
       post-debootstrap-installer.sh \
-      authorized_keys
+      authorized_keys \
       "$chroot"
 
 # set hostname