diff --git a/airootfs/root/install.sh b/airootfs/root/install.sh
index ac099a8..c8f10a9 100644
--- a/airootfs/root/install.sh
+++ b/airootfs/root/install.sh
@@ -425,7 +425,7 @@ EOT
   done
 
   cat >"${INSTALLATION_MOUNTPOINT}/${INSTALLATION_PILLAR_ROOT}/system/init.sls" << EOT
-system.timestamp: ${START_TIMESTAMP}
+system.disks.timestamp: ${START_TIMESTAMP}
 EOT
 
   installationSubtaskTitle "Salt highstate"