diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index c5b9bcf..12a5182 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -518,7 +518,7 @@
 			hdr.sbp = cgc.sense;
 			if (hdr.sbp)
 				hdr.mx_sb_len = sizeof(struct request_sense);
-			hdr.timeout = cgc.timeout;
+			hdr.timeout = jiffies_to_msecs(cgc.timeout);
 			hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
 			hdr.cmd_len = sizeof(cgc.cmd);