diff --git a/speeduino/sensors.ino b/speeduino/sensors.ino
index 7e7ebc60..0013a220 100644
--- a/speeduino/sensors.ino
+++ b/speeduino/sensors.ino
@@ -48,7 +48,7 @@ void initialiseADC()
      BIT_CLEAR(ADCSRA,ADPS0);
   #endif
 #elif defined(ARDUINO_ARCH_STM32) //STM32GENERIC core and ST STM32duino core, change analog read to 12 bit
-  analogReadResolution(12); //use 10bits for analog
+  analogReadResolution(12); //use 12bits for analog reading on STM32 boards
 #endif
   MAPcurRev = 0;
   MAPcount = 0;