diff --git a/firmware/hw_layer/AdcConfiguration.h b/firmware/hw_layer/AdcConfiguration.h
index e63486e19c..b6a7b2a802 100644
--- a/firmware/hw_layer/AdcConfiguration.h
+++ b/firmware/hw_layer/AdcConfiguration.h
@@ -9,7 +9,9 @@
 
 #if HAL_USE_ADC
 
+#ifndef ADC_MAX_CHANNELS_COUNT
 #define ADC_MAX_CHANNELS_COUNT 16
+#endif /* ADC_MAX_CHANNELS_COUNT */
 
 // this structure contains one multi-channel ADC state snapshot
 typedef struct {
@@ -22,7 +24,7 @@ public:
 	void enableChannel(adc_channel_e hwChannelIndex);
 	void enableChannelAndPin(adc_channel_e hwChannelIndex);
 	adc_channel_e getAdcHardwareIndexByInternalIndex(int index) const;
-	int internalAdcIndexByHardwareIndex[20];
+	int internalAdcIndexByHardwareIndex[ADC_MAX_CHANNELS_COUNT + 4];
 	bool isHwUsed(adc_channel_e hwChannel) const;
 	int size() const;
 	void init(void);
@@ -48,8 +50,8 @@ private:
 	/**
 	 * Number of ADC channels in use
 	 */
-
-	adc_channel_e hardwareIndexByIndernalAdcIndex[20];
+	 
+	adc_channel_e hardwareIndexByIndernalAdcIndex[ADC_MAX_CHANNELS_COUNT + 4];
 };
 
 #endif /* HAL_USE_ADC */