diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index c2040a0..076a476 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -630,6 +630,7 @@
 	 *	Fill in the basic HWIF bits
 	 */
 
+	hwif->host_flags |= IDE_HFLAG_MMIO;
 	default_hwif_mmiops(hwif);
 	hwif->hwif_data			= addr;