diff --git a/drivers/ide/trm290.c b/drivers/ide/trm290.c
index 1c09e54..e8279f3 100644
--- a/drivers/ide/trm290.c
+++ b/drivers/ide/trm290.c
@@ -198,6 +198,7 @@
 		rw = 2;
 
 	if (!(count = ide_build_dmatable(drive, rq))) {
+		ide_map_sg(drive, rq);
 		/* try PIO instead of DMA */
 		trm290_prepare_drive(drive, 0); /* select PIO xfer */
 		return 1;