diff --git a/angelsrefining/prototypes/technology/refining-technology.lua b/angelsrefining/prototypes/technology/refining-technology.lua
index 553b0d0d9..0989d198d 100644
--- a/angelsrefining/prototypes/technology/refining-technology.lua
+++ b/angelsrefining/prototypes/technology/refining-technology.lua
@@ -1030,6 +1030,7 @@ data:extend({
     prerequisites = {
       "ore-powderizer",
       "thermal-water-extraction-2",
+      "ore-leaching",
     },
     effects = {
       {