diff --git a/companion/src/firmwares/opentx/opentxeeprom.cpp b/companion/src/firmwares/opentx/opentxeeprom.cpp
index f88b2326d..98d2cedd0 100644
--- a/companion/src/firmwares/opentx/opentxeeprom.cpp
+++ b/companion/src/firmwares/opentx/opentxeeprom.cpp
@@ -118,7 +118,7 @@ class SwitchesConversionTable: public ConversionTable {
       if (version >= 218) {
         addConversion(RawSwitch(SWITCH_TYPE_TELEMETRY, -1), -val+offset);
         addConversion(RawSwitch(SWITCH_TYPE_TELEMETRY, 1), val++);
-        for (unsigned i=1; i<=CPN_MAX_SENSORS; i++) {
+        for (int i=1; i<=CPN_MAX_SENSORS; i++) {
           addConversion(RawSwitch(SWITCH_TYPE_SENSOR, -i), -val+offset);
           addConversion(RawSwitch(SWITCH_TYPE_SENSOR, i), val++);
         }
diff --git a/companion/src/firmwares/sensordata.h b/companion/src/firmwares/sensordata.h
index 15b398fb8..a4555c414 100644
--- a/companion/src/firmwares/sensordata.h
+++ b/companion/src/firmwares/sensordata.h
@@ -23,7 +23,7 @@
 
 #include <QtCore>
 
-constexpr unsigned CPN_MAX_SENSORS = 60;
+constexpr int CPN_MAX_SENSORS = 60;
 
 class SensorData {
   Q_DECLARE_TR_FUNCTIONS(SensorData)