diff --git a/roles/nagios/client/templates/check_disk.cfg.j2 b/roles/nagios/client/templates/check_disk.cfg.j2
index 5c31447711..67b4a4e5b3 100644
--- a/roles/nagios/client/templates/check_disk.cfg.j2
+++ b/roles/nagios/client/templates/check_disk.cfg.j2
@@ -1,4 +1,4 @@
-command[check_disk_/]={{ libdir }}/nagios/plugins/check_disk -w 15% -c 10% -p /
+command[check_disk_/]={{ libdir }}/nagios/plugins/check_disk -w 14% -c 10% -p /
 command[check_disk_/boot]={{ libdir }}/nagios/plugins/check_disk -w 15% -c 10% -p /boot
 command[check_disk_/srv/cache/lookaside]={{ libdir }}/nagios/plugins/check_disk -w 20% -c 10% -p /srv/cache/lookaside
 command[check_disk_/srv]=/usr/lib64/nagios/plugins/check_disk -w 20% -c 10% -p /srv