diff --git a/includes/definitions/discovery/apc.yaml b/includes/definitions/discovery/apc.yaml
index 98ddf32a50..c30484dd46 100644
--- a/includes/definitions/discovery/apc.yaml
+++ b/includes/definitions/discovery/apc.yaml
@@ -321,6 +321,10 @@ modules:
                         oid: rPDU2SensorTempHumidityStatusType
                         op: '='
                         value: 4
+                      - 
+                        oid: rPDU2SensorTempHumidityStatusRelativeHumidity
+                        op: '<'
+                        value: 0
         airflow:
             data:
                 -