diff --git a/includes/discovery/sensors/fanspeed/apc.inc.php b/includes/discovery/sensors/fanspeed/apc.inc.php
index 68e5e73e33..15dee9817b 100644
--- a/includes/discovery/sensors/fanspeed/apc.inc.php
+++ b/includes/discovery/sensors/fanspeed/apc.inc.php
@@ -23,7 +23,7 @@
  * @author     Neil Lathwood <neil@lathwood.co.uk>
  */
 
-foreach ($cooling_unit_analog as $index => $data) {
+foreach ($pre_cache['cooling_unit_analog'] as $index => $data) {
     $cur_oid = '.1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.' . $index;
     $descr = $data['coolingUnitStatusAnalogDescription'];
     $scale = $data['coolingUnitStatusAnalogScale'];
diff --git a/includes/discovery/sensors/power/apc.inc.php b/includes/discovery/sensors/power/apc.inc.php
index db2bb3fb63..01a359ddc0 100644
--- a/includes/discovery/sensors/power/apc.inc.php
+++ b/includes/discovery/sensors/power/apc.inc.php
@@ -23,7 +23,7 @@
  * @author     Neil Lathwood <neil@lathwood.co.uk>
  */
 
-foreach ($cooling_unit_analog as $index => $data) {
+foreach ($pre_cache['cooling_unit_analog'] as $index => $data) {
     $cur_oid = '.1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.' . $index;
     $descr = $data['coolingUnitStatusAnalogDescription'];
     $scale = $data['coolingUnitStatusAnalogScale'];
diff --git a/includes/discovery/sensors/temperature/apc.inc.php b/includes/discovery/sensors/temperature/apc.inc.php
index eae79b0632..3d2ae4bab7 100644
--- a/includes/discovery/sensors/temperature/apc.inc.php
+++ b/includes/discovery/sensors/temperature/apc.inc.php
@@ -154,7 +154,8 @@ foreach ($cooling_unit as $index => $data) {
     }
 }
 
-foreach ($cooling_unit_analog as $index => $data) {
+
+foreach ($pre_cache['cooling_unit_analog'] as $index => $data) {
     $cur_oid = '.1.3.6.1.4.1.318.1.1.27.1.4.1.2.1.3.' . $index;
     $descr = $data['coolingUnitStatusAnalogDescription'];
     $scale = $data['coolingUnitStatusAnalogScale'];