diff --git a/compatibility.lua b/compatibility.lua
index 8fe4ff5..0109f35 100644
--- a/compatibility.lua
+++ b/compatibility.lua
@@ -520,6 +520,7 @@ if industrialtest.mclAvailable then
 	industrialtest.elementKeys.ice="mcl_core:ice"
 	industrialtest.elementKeys.sandstone="mcl_core:sandstone"
 	industrialtest.elementKeys.dirt="mcl_core:dirt"
+	industrialtest.elementKeys.grassBlock="mcl_core:dirt_with_grass"
 	industrialtest.elementKeys.obsidian="mcl_core:obsidian"
 	industrialtest.elementKeys.whiteWool="mcl_wool:white"
 	industrialtest.elementKeys.coalBlock="mcl_core:coalblock"
@@ -728,6 +729,7 @@ elseif industrialtest.mtgAvailable then
 	industrialtest.elementKeys.ice="default:ice"
 	industrialtest.elementKeys.sandstone="default:sandstone"
 	industrialtest.elementKeys.dirt="default:dirt"
+	industrialtest.elementKeys.grassBlock="default:dirt_with_grass"
 	industrialtest.elementKeys.obsidian="default:obsidian"
 	industrialtest.elementKeys.whiteWool="wool:white"
 	industrialtest.elementKeys.coalBlock="default:coalblock"
diff --git a/mapgen.lua b/mapgen.lua
index c191323..f605a98 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -19,7 +19,7 @@ minetest.register_on_generated(function(minp,maxp,seed)
 		return
 	end
 	local center=vector.new((maxp.x-minp.x)/2+ minp.x,(maxp.y-minp.y)/2+minp.y,(maxp.z-minp.z)/2+minp.z)
-	local pos=minetest.find_node_near(center,maxp.x-minp.x,{"default:dirt_with_grass"})
+	local pos=minetest.find_node_near(center,maxp.x-minp.x,{industrialtest.elementKeys.grassBlock})
 	if pos then
 		industrialtest.makeRubberTree(pos)
 	end