diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index 46d892a49406e8e3512883de6249e0e22f557dce..cf5deac01210f59d28fc16363913b52f3814d2c5 100644
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -406,10 +406,6 @@ struct rtdPrivate {
 
 /* Macros to access registers */
 
-/* Set PCI address for DMA 0 */
-#define RtdDma0PciAddr(dev, a) \
-	writel((a), devpriv->lcfg+LCFG_DMAPADR0)
-
 /* Set local address for DMA 0 */
 #define RtdDma0LocalAddr(dev, a) \
 	writel((a), devpriv->lcfg+LCFG_DMALADR0)