diff --git a/includes/discovery/sensors/frequency/linux.inc.php b/includes/discovery/sensors/frequency/linux.inc.php
index da9cb248ea..95c588c6e0 100644
--- a/includes/discovery/sensors/frequency/linux.inc.php
+++ b/includes/discovery/sensors/frequency/linux.inc.php
@@ -4,7 +4,7 @@
  * requires snmp extend agent script from librenms-agent
  */
 $sensor_type = "raspberry_freq";
-$oid = '1.3.6.1.4.1.8072.1.3.2.4.1.2.9.114.97.115.112.98.101.114.114.121.';
+$oid = '.1.3.6.1.4.1.8072.1.3.2.4.1.2.9.114.97.115.112.98.101.114.114.121.';
 
 for ($freq = 6; $freq < 8; $freq++) {
     switch ($freq) {
diff --git a/includes/discovery/sensors/voltage/linux.inc.php b/includes/discovery/sensors/voltage/linux.inc.php
index 20ad621092..b1895a89d7 100644
--- a/includes/discovery/sensors/voltage/linux.inc.php
+++ b/includes/discovery/sensors/voltage/linux.inc.php
@@ -4,7 +4,7 @@
  * requires snmp extend agent script from librenms-agent
  */
 $sensor_type = "rasbperry_volts";
-$oid = '1.3.6.1.4.1.8072.1.3.2.4.1.2.9.114.97.115.112.98.101.114.114.121.';
+$oid = '.1.3.6.1.4.1.8072.1.3.2.4.1.2.9.114.97.115.112.98.101.114.114.121.';
 for ($volt = 2; $volt < 6; $volt++) {
     switch ($volt) {
         case "2":