diff --git a/lambda-test/lambda-test.c b/lambda-test/lambda-test.c
index 4aefc00..967c15e 100644
--- a/lambda-test/lambda-test.c
+++ b/lambda-test/lambda-test.c
@@ -78,7 +78,7 @@
 	// AVCC is set as AREF
 	assertTrue(bit_is_set(ADMUX, REFS0));
 	// digital inputs are disabled
-	uint8_t adcPorts = (1 << PC0) | (1 << PC2) | (1 << PC5);
+	uint8_t adcPorts = (1 << ADC_TEMPI) | (1 << ADC_TEMPO) | (1 << ADC_LAMBDA);
 	assertTrue((DIDR0 & adcPorts) == adcPorts);
 	// ADC clock prescaler/8
 	uint8_t prescalerBy8 = (1 << ADPS1) | (1 << ADPS0);
diff --git a/lambda/adc.c b/lambda/adc.c
index 1d9eee0..15b5f9d 100644
--- a/lambda/adc.c
+++ b/lambda/adc.c
@@ -24,7 +24,7 @@
 	ADMUX |= (1 << REFS0);
 	// disable digital input on the ADC inputs
 	// http://www.openmusiclabs.com/learning/digital/atmega-adc/
-	DIDR0 |= (1 << PC0) | (1 << PC2) | (1 << PC5);
+	DIDR0 |= (1 << ADC_TEMPI) | (1 << ADC_TEMPO) | (1 << ADC_LAMBDA);
 	// ADC clock prescaler/8
 	ADCSRA |= (1 << ADPS1) | (1 << ADPS0);
 	// enable ADC
diff --git a/lambda/adc.h b/lambda/adc.h
index 6dfd73e..041c885 100644
--- a/lambda/adc.h
+++ b/lambda/adc.h
@@ -19,6 +19,10 @@
 // #define TEMPO_OP_OFFSET_MV 441
 #define TEMPO_OP_OFFSET_MV 454
 
+#define ADC_TEMPI PC5  // PC5 on diagram
+#define ADC_TEMPO PC0  // PC4 on diagram
+#define ADC_LAMBDA PC2 // PC3 on diagram
+
 /**
  * Sets up reference voltage and clock prescaler of the ADC and enables it.
  */
diff --git a/lambda/sensors.h b/lambda/sensors.h
index 52a9b83..fa53989 100644
--- a/lambda/sensors.h
+++ b/lambda/sensors.h
@@ -18,10 +18,6 @@
 #define IDEAL "Ideal"
 #define RICH "Fett!"
 
-#define ADC_TEMPI PC5  // PC5 on diagram
-#define ADC_TEMPO PC0  // PC4 on diagram
-#define ADC_LAMBDA PC2 // PC3 on diagram
-
 /**
  * Entry for the lookup tables.
  */