diff --git a/lambda/adc.c b/lambda/adc.c
index 984e303..5121112 100644
--- a/lambda/adc.c
+++ b/lambda/adc.c
@@ -1,7 +1,7 @@
 /*
  * adc.c
  *
- * Functions to set up the ADC and get voltages from its ports.
+ * Functions to set up the ADC and get voltages from its pins.
  *
  *  Created on: 11.03.2015
  *      Author: dode@luniks.net
@@ -37,9 +37,9 @@
 	sei();
 }
 
-int16_t getVoltage(uint8_t port) {
+int16_t getVoltage(uint8_t pin) {
 
-	ADMUX = (0b11110000 & ADMUX) | port;
+	ADMUX = (0b11110000 & ADMUX) | pin;
 
 	uint32_t overValue = 0;
 	for (uint8_t i = 0; i < 16; i++) {
diff --git a/lambda/adc.h b/lambda/adc.h
index 5604d54..cdacb79 100644
--- a/lambda/adc.h
+++ b/lambda/adc.h
@@ -1,7 +1,7 @@
 /*
  * adc.h
  *
- * Functions to set up the ADC and get voltages from its ports.
+ * Functions to set up the ADC and get voltages from its pins.
  *
  *  Created on: 11.03.2015
  *      Author: dode@luniks.net
@@ -30,10 +30,10 @@
 void setupSleepMode(void);
 
 /**
- * Returns the voltage sampled at the given ADC input port doing
+ * Returns the voltage sampled at the given ADC input pin doing
  * 16x oversampling and taking in account the calibrated AREF and
  * ADC offset voltages.
  */
-int16_t getVoltage(uint8_t port);
+int16_t getVoltage(uint8_t pin);
 
 #endif /* ADC_H_ */