diff --git a/locale/en/lang_en.cfg b/locale/en/lang_en.cfg
index f0c5d2e..7b4f831 100644
--- a/locale/en/lang_en.cfg
+++ b/locale/en/lang_en.cfg
@@ -477,6 +477,7 @@ gr_ind2_tech=Advanced elements
 el_ALK_tech=Aluminium-ceramic composite metal
 el_arc_furnace_tech=Arc furnace
 el_purifier_tech=Ore purification
+el_purifier_2_tech=Aluminium focused purification
 el_caster_tech=Metal casting
 el_grower_tech=Crystal growing