diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index f308a03..3790906 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -467,7 +467,7 @@
 	/* Cheat: usually extracted from Inquiry data */
 	sdev->tagged_supported = 1;
 
-	scsi_activate_tcq(sdev, sdev->host->can_queue);
+	scsi_activate_tcq(sdev, ST_CMD_PER_LUN);
 
 	return 0;
 }