diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 9d8686a..ec5f58c 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1363,6 +1363,7 @@
 
 		if (rc < 0) {
 			printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
+			hwif->dma_base = 0;
 			hwif->swdma_mask = 0;
 			hwif->mwdma_mask = 0;
 			hwif->ultra_mask = 0;