diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 213123b0486b..41a21772df12 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -887,7 +887,7 @@ static int resp_start_stop(struct scsi_cmnd * scp,
 static sector_t get_sdebug_capacity(void)
 {
 	if (scsi_debug_virtual_gb > 0)
-		return 2048 * 1024 * scsi_debug_virtual_gb;
+		return 2048 * 1024 * (sector_t)scsi_debug_virtual_gb;
 	else
 		return sdebug_store_sectors;
 }