diff --git a/doc/Support/SNMP-Configuration-Examples.md b/doc/Support/SNMP-Configuration-Examples.md
index 590f677c91..357d677760 100644
--- a/doc/Support/SNMP-Configuration-Examples.md
+++ b/doc/Support/SNMP-Configuration-Examples.md
@@ -266,7 +266,7 @@ extend .1.3.6.1.4.1.2021.7890.1 distro /usr/bin/distro
 #extend .1.3.6.1.4.1.2021.7890.4 serial '/bin/cat /sys/devices/virtual/dmi/id/product_serial'
 ```
 
-**NOTE**: On some systems the snmpd is running as its own user, which means it can't read `/sys/devices/virtual/dmi/id/product_serial` which is mode 0400. One solution is to `chmod 444 /sys/devices/virtual/dmi/id/product_serial` in `/etc/rc.local` or equivalent.
+**NOTE**: On some systems the snmpd is running as its own user, which means it can't read `/sys/devices/virtual/dmi/id/product_serial` which is mode 0400. One solution is to include `@reboot chmod 444 /sys/devices/virtual/dmi/id/product_serial` in the crontab for root or equivalent. 
 
 The LibreNMS server include a copy of this example here: