diff --git a/roles/gitlab_runner/files/libvirt-executor-update-base-image b/roles/gitlab_runner/files/libvirt-executor-update-base-image
index 3bd6a68307058ea9160fc605dde02114f5986c4c..5e56a9ead571473cc92da11e70e32f55092502fb 100755
--- a/roles/gitlab_runner/files/libvirt-executor-update-base-image
+++ b/roles/gitlab_runner/files/libvirt-executor-update-base-image
@@ -4,6 +4,8 @@ readonly libvirt_default_pool_path="/var/lib/libvirt/images"
 readonly arch_boxes_signing_key=/usr/local/lib/libvirt-executor/arch-boxes.asc
 readonly arch_boxes_fingerprint=1B9A16984A4E8CB448712D2AE0B78BF4326C6F8F
 
+loopdev=""
+
 cleanup() {
   set +o errexit