diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c
index 078adbe..a4740e4 100644
--- a/drivers/ide/pci/atiixp.c
+++ b/drivers/ide/pci/atiixp.c
@@ -155,7 +155,7 @@
 
 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 {
-	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
+	pio = ide_get_best_pio_mode(drive, pio, 4);
 	atiixp_tune_pio(drive, pio);
 	(void)ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 }