diff --git a/src/WeatherSensor.cpp b/src/WeatherSensor.cpp
index b277ce00..debb5774 100644
--- a/src/WeatherSensor.cpp
+++ b/src/WeatherSensor.cpp
@@ -1002,7 +1002,8 @@ First two bytes are an LFSR-16 digest, generator 0x8810 key 0xabf9 with a final
 
 #ifdef BRESSER_LIGHTNING
 DecodeStatus WeatherSensor::decodeBresserLightningPayload(const uint8_t *msg, uint8_t msgSize)
-{   
+{
+    (void)msgSize;
     #if CORE_DEBUG_LEVEL == ARDUHAL_LOG_LEVEL_VERBOSE
         // see AS3935 Datasheet, Table 17 - Distance Estimation
         uint8_t const distance_map[] = { 1, 5, 6, 8, 10, 12, 14, 17, 20, 24, 27, 31, 34, 37, 40, 63 };