diff --git a/drivers/ide/pci/generic.c b/drivers/ide/pci/generic.c
index 0688569..22ef348 100644
--- a/drivers/ide/pci/generic.c
+++ b/drivers/ide/pci/generic.c
@@ -104,7 +104,8 @@
 
 	{	/* 14 */
 		.name		= "Revolution",
-		.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+		.host_flags	= IDE_HFLAG_CLEAR_SIMPLEX |
+				  IDE_HFLAG_TRUST_BIOS_FOR_DMA |
 				  IDE_HFLAG_OFF_BOARD,
 		.swdma_mask	= ATA_SWDMA2,
 		.mwdma_mask	= ATA_MWDMA2,