diff --git a/hashcat.hctune b/hashcat.hctune
index ad10805b1..428ffa163 100644
--- a/hashcat.hctune
+++ b/hashcat.hctune
@@ -394,7 +394,7 @@ Iris                                            *       6213    1       8
 Iris                                            *       6221    1       4       200
 Iris                                            *       6222    1       4       200
 Iris                                            *       6223    1       4       200
-Iris                                            *       6231    1       4       200
+Iris                                            *       6231    1       1       16
 Iris                                            *       6232    1       4       200
 Iris                                            *       6233    1       4       200
 Iris                                            *       6241    1       4       200