diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index c94ad12ed446..a7255d13775a 100644
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -579,7 +579,7 @@ static int rtd_ai_rinsn(struct comedi_device *dev,
 
 		/* read data */
 		d = readw(devpriv->las1 + LAS1_ADC_FIFO);
-		d = d >> 3;	/* low 3 bits are marker lines */
+		d >>= 3;	/* low 3 bits are marker lines */
 
 		/* convert bipolar data to comedi unsigned data */
 		if (comedi_range_is_bipolar(s, range))
@@ -616,7 +616,7 @@ static int ai_read_n(struct comedi_device *dev, struct comedi_subdevice *s,
 		}
 
 		d = readw(devpriv->las1 + LAS1_ADC_FIFO);
-		d = d >> 3;	/* low 3 bits are marker lines */
+		d >>= 3;	/* low 3 bits are marker lines */
 
 		/* convert bipolar data to comedi unsigned data */
 		if (comedi_range_is_bipolar(s, range))