diff --git a/drivers/include/mq3.h b/drivers/include/mq3.h
index 55dde35013..f10944e64d 100644
--- a/drivers/include/mq3.h
+++ b/drivers/include/mq3.h
@@ -33,8 +33,7 @@ extern "C" {
  * @brief device descriptor for a MQ-3 sensor
  */
 typedef struct {
-    adc_t adc_dev;          /**< the used ADC device */
-    int adc_chan;           /**< used channel of the ADC */
+    adc_t adc_line;         /**< the used ADC line */
 } mq3_t;
 
 /**
@@ -47,12 +46,11 @@ typedef struct {
  *
  * @param[out] dev      device descriptor of an MQ-3 sensor
  * @param[in] adc       the ADC device the sensor is connected to
- * @param[in] channel   the channel of the ADC device used
  *
  * @return              0 on success
  * @return              -1 on error
  */
-int mq3_init(mq3_t *dev, adc_t adc, int channel);
+int mq3_init(mq3_t *dev, adc_t adc_line);
 
 /**
  * @brief Read the RAW sensor value, can be between 0 and MQ3_MAX_RAW_VALUE
diff --git a/drivers/mq3/mq3.c b/drivers/mq3/mq3.c
index e3fe6285e7..1ad77a95c5 100644
--- a/drivers/mq3/mq3.c
+++ b/drivers/mq3/mq3.c
@@ -24,16 +24,15 @@
 #define MIN                 (100U)              /* TODO: calibrate to useful value */
 #define FACTOR              (2.33f)             /* TODO: calibrate to useful value */
 
-int mq3_init(mq3_t *dev, adc_t adc, int channel)
+int mq3_init(mq3_t *dev, adc_t adc_line)
 {
-    dev->adc_dev = adc;
-    dev->adc_chan = channel;
-    return adc_init(dev->adc_dev, PRECISION);
+    dev->adc_line = adc_line;
+    return adc_init(dev->adc_line);
 }
 
 int mq3_read_raw(mq3_t *dev)
 {
-    return adc_sample(dev->adc_dev, dev->adc_chan);
+    return adc_sample(dev->adc_line, PRECISION);
 }
 
 int mq3_read(mq3_t *dev)