diff --git a/craft.lua b/craft.lua
index d94a9f8..4e59b3f 100644
--- a/craft.lua
+++ b/craft.lua
@@ -30,6 +30,6 @@ if minetest.get_modpath("bunker") and minetest.get_modpath("technic") then
 
     technic.register_grinder_recipe({
         input = {'default:clay_lump'},
-        output = {'bunker:cement_powder'}
+        output = 'bunker:cement_powder 1'
     })
 end
\ No newline at end of file
diff --git a/mod.conf b/mod.conf
index f7f24fe..c10b0f3 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,7 +1,7 @@
 name = surface_effect
 description = surface effect
 depends = default, persistent_effects, mobs_monster, radiant_damage, hazmat_suit, ethereal
-optional_depends = technic, farming, space_travel
+optional_depends = technic, farming, space_travel, bunker
 min_minetest_version = 5.7
 title = Surface Effect
 release = 0