diff --git a/sonoff/xsns_05_ds18x20.ino b/sonoff/xsns_05_ds18x20.ino
index 545b27e72..23dc4482e 100644
--- a/sonoff/xsns_05_ds18x20.ino
+++ b/sonoff/xsns_05_ds18x20.ino
@@ -336,11 +336,7 @@ boolean Ds18x20Read(uint8_t sensor, float &t)
         break;
       case MAX31850_CHIPID:
         temp14 = (data[1] << 8) + (data[0] & 0xFC);
-        if (temp14 < 0) {
-          temp14 = (~temp14) +1;
-          sign = -1;
-        }
-        t = ConvertTemp(sign * temp14 * 0.0625);  // Divide by 16
+        t = ConvertTemp(temp14 * 0.0625);  // Divide by 16
         break;
       }
     }
diff --git a/sonoff/xsns_05_ds18x20_legacy.ino b/sonoff/xsns_05_ds18x20_legacy.ino
index d352c064c..085280ece 100644
--- a/sonoff/xsns_05_ds18x20_legacy.ino
+++ b/sonoff/xsns_05_ds18x20_legacy.ino
@@ -140,12 +140,8 @@ boolean Ds18x20Read(uint8_t sensor, float &t)
       t = ConvertTemp(sign * temp12 * 0.0625);  // Divide by 16
       break;
     case MAX31850_CHIPID:
-      temp14 = (data[1] << 8) + (data[0] & 0xFC);
-      if (temp14 < 0) {
-        temp14 = (~temp14) +1;
-        sign = -1;
-      }
-      t = ConvertTemp(sign * temp14 * 0.0625);  // Divide by 16
+        temp14 = (data[1] << 8) + (data[0] & 0xFC);
+        t = ConvertTemp(temp14 * 0.0625);  // Divide by 16
       break;
     }
   }