diff --git a/builds/amd64/installer/legacy/builds/amd64-installer.sh b/builds/amd64/installer/legacy/builds/amd64-installer.sh
index a75ba06d..0f12a5a0 100644
--- a/builds/amd64/installer/legacy/builds/amd64-installer.sh
+++ b/builds/amd64/installer/legacy/builds/amd64-installer.sh
@@ -305,7 +305,7 @@ do_cleanup()
   cat /var/log/onie.log > /dev/console
   installer_say "Install failed. See log messages above for details"
 
-  grep "$workdir" /proc/mounts | cut -d' ' -f2 | sort -r | xargs -n 1 umount
+  grep "$workdir" /proc/mounts | cut -d' ' -f2 | sort -r | xargs -r -n 1 umount
   cd /tmp
   rm -fr "$workdir"