diff --git a/tasmota/xdrv_23_zigbee_5_converters.ino b/tasmota/xdrv_23_zigbee_5_converters.ino
index bf508d9c2..70cbfe128 100644
--- a/tasmota/xdrv_23_zigbee_5_converters.ino
+++ b/tasmota/xdrv_23_zigbee_5_converters.ino
@@ -1397,7 +1397,7 @@ int32_t Z_ApplyConverter(const class ZCLFrame *zcl, uint16_t shortaddr, JsonObje
       if (multiplier > 0) {
         json[new_name] = ((float)value) * multiplier;
       } else {
-        json[new_name] = ((float)value) / multiplier;
+        json[new_name] = ((float)value) / (-multiplier);
       }
   }
 
diff --git a/tasmota/xdrv_23_zigbee_9_impl.ino b/tasmota/xdrv_23_zigbee_9_impl.ino
index 0ea39c194..4da0a48f6 100644
--- a/tasmota/xdrv_23_zigbee_9_impl.ino
+++ b/tasmota/xdrv_23_zigbee_9_impl.ino
@@ -483,7 +483,7 @@ void ZbSendReportWrite(const JsonObject &val_pubwrite, uint16_t device, uint16_t
       if (multiplier > 0) {         // inverse of decoding
         val_f = val_f / multiplier;
       } else {
-        val_f = val_f * multiplier;
+        val_f = val_f * (-multiplier);
       }
       use_val = false;
     }