diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp index 7307b24aa8..a0413f710e 100644 --- a/Marlin/temperature.cpp +++ b/Marlin/temperature.cpp @@ -885,6 +885,8 @@ ISR(TIMER0_COMPB_vect) #if (TEMP_BED_PIN > -1) #if TEMP_BED_PIN > 7 ADCSRB = 1<<MUX5; + #else + ADCSRB = 0; #endif ADMUX = ((1 << REFS0) | (TEMP_BED_PIN & 0x07)); ADCSRA |= 1<<ADSC; // Start conversion