diff --git a/cluster/libvirt-coreos/util.sh b/cluster/libvirt-coreos/util.sh
index bba4e79f61f..c4feeddd0f1 100644
--- a/cluster/libvirt-coreos/util.sh
+++ b/cluster/libvirt-coreos/util.sh
@@ -16,6 +16,8 @@
 
 # A library of helper functions that each provider hosting Kubernetes must implement to use cluster/kube-*.sh scripts.
 
+[ ! -z ${UTIL_SH_DEBUG+x} ] && set -x
+
 KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
 readonly ROOT=$(dirname "${BASH_SOURCE}")
 source "$ROOT/${KUBE_CONFIG_FILE:-"config-default.sh"}"