diff --git a/sdk_container/src/third_party/coreos-overlay/sys-block/open-iscsi/files/iscsi-init.service b/sdk_container/src/third_party/coreos-overlay/sys-block/open-iscsi/files/iscsi-init.service
index c78005c549..861a371062 100644
--- a/sdk_container/src/third_party/coreos-overlay/sys-block/open-iscsi/files/iscsi-init.service
+++ b/sdk_container/src/third_party/coreos-overlay/sys-block/open-iscsi/files/iscsi-init.service
@@ -6,4 +6,4 @@ ConditionPathExists=!/etc/iscsi/initiatorname.iscsi
 [Service]
 Type=oneshot
 RemainAfterExit=no
-ExecStart=/usr/bin/sh -c 'echo "InitiatorName=`/usr/sbin/iscsi-iname`" > /etc/iscsi/initiatorname.iscsi'
+ExecStart=/usr/bin/sh -c 'echo "InitiatorName=$(/usr/sbin/iscsi-iname)" > /etc/iscsi/initiatorname.iscsi'