diff --git a/drivers/staging/comedi/drivers/adq12b.c b/drivers/staging/comedi/drivers/adq12b.c
index dbb9d588c729..315050454c26 100644
--- a/drivers/staging/comedi/drivers/adq12b.c
+++ b/drivers/staging/comedi/drivers/adq12b.c
@@ -129,7 +129,7 @@ static int adq12b_ai_insn_read(struct comedi_device *dev,
 	if (val != devpriv->last_ctreg) {
 		outb(val, dev->iobase + ADQ12B_CTREG);
 		devpriv->last_ctreg = val;
-		udelay(50);	/* wait for the mux to settle */
+		usleep_range(50, 100);	/* wait for the mux to settle */
 	}
 
 	val = inb(dev->iobase + ADQ12B_ADLOW);	/* trigger A/D */