diff --git a/drivers/ata/ide-sff.c b/drivers/ata/ide-sff.c
index a8f2b26..e32cc3f 100644
--- a/drivers/ata/ide-sff.c
+++ b/drivers/ata/ide-sff.c
@@ -118,7 +118,7 @@
 {
 	uint8_t status;
 	uint64_t start = get_time_ns();
-	uint64_t toffs = timeout * 1000 * 1000;
+	uint64_t toffs = timeout * MSECOND;
 
 	do {
 		status = ata_rd_status(ide);