diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index 8af88bf0969bde8bf41926e1e5834deed20022f6..54d57a15d59eb3dac55dab7259ffd2a24cfff641 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -345,7 +345,7 @@ static int set_xfer_rate (ide_drive_t *drive, int arg)
 	ide_task_t task;
 	int err;
 
-	if (arg < 0 || arg > 70)
+	if (arg < 0 || (arg > 1 && arg < XFER_PIO_0) || arg > XFER_UDMA_6)
 		return -EINVAL;
 
 	memset(&task, 0, sizeof(task));