diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 2574d6fbb1ad..06b7c4a9ec95 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -192,6 +192,7 @@ static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
 /**
  *	hpt366_filter	-	mode selection filter
  *	@adev: ATA device
+ *	@mask: Current mask to manipulate and pass back
  *
  *	Block UDMA on devices that cause trouble with this controller.
  */