diff --git a/multidecor.lua b/multidecor.lua
index a0d5073..6d28290 100644
--- a/multidecor.lua
+++ b/multidecor.lua
@@ -43,3 +43,5 @@ minetest.register_craft({
         { 'tech_additions:zinc_ingot_block', },
     }
 })
+
+techage.add_grinder_recipe({input="multidecor:granite_block", output="default:gravel"})