diff --git a/firmware/hw_layer/adc_inputs.cpp b/firmware/hw_layer/adc_inputs.cpp
index d853fa45a8..1f9bfbde97 100644
--- a/firmware/hw_layer/adc_inputs.cpp
+++ b/firmware/hw_layer/adc_inputs.cpp
@@ -157,9 +157,9 @@ static void pwmpcb_slow(PWMDriver *pwmp) {
 	 terminate before the next PWM cycle.*/
 	chSysLockFromIsr()
 	;
-	if (ADC_FAST_DEVICE.state != ADC_READY &&
-	ADC_FAST_DEVICE.state != ADC_COMPLETE &&
-	ADC_FAST_DEVICE.state != ADC_ERROR) {
+	if (ADC_SLOW_DEVICE.state != ADC_READY &&
+	ADC_SLOW_DEVICE.state != ADC_COMPLETE &&
+	ADC_SLOW_DEVICE.state != ADC_ERROR) {
 		// todo: why and when does this happen? firmwareError("ADC slow not ready?");
 		slowAdc.errorsCount++;
 		chSysUnlockFromIsr()