diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 505878c..40e992a 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -888,7 +888,8 @@
        	base = (unsigned long) addr;
 
 	hwif->dma_base			= base + (ch ? 0x08 : 0x00);
-	hwif->mmio			= 2;
+
+	hwif->mmio = 1;
 }
 
 static int is_dev_seagate_sata(ide_drive_t *drive)