diff --git a/salt/telegraf/etc/telegraf.conf b/salt/telegraf/etc/telegraf.conf
index 70ca7837f..9f810f490 100644
--- a/salt/telegraf/etc/telegraf.conf
+++ b/salt/telegraf/etc/telegraf.conf
@@ -80,7 +80,7 @@
   logfile = "/var/log/telegraf/telegraf.log"
 
   ## Override default hostname, if empty use os.Hostname()
-  hostname = "{{ grains.host }}"
+  hostname = "{{ grains.host | lower }}"
   ## If set to true, do no set the "host" tag in the telegraf agent.
   omit_hostname = false