diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index 31538182e..79410f3e0 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -64,7 +64,10 @@ local function register_biomes()
 
 	minetest.register_biome({
 		name = "tundra",
-		node_dust = "mcl_core:snowblock",
+		node_top = "mcl_core:snowblock",
+		depth_top = 1,
+		node_filler = "mcl_core:dirt",
+		depth_filler = 2,
 		node_riverbed = "mcl_core:gravel",
 		depth_riverbed = 2,
 		y_min = 2,
@@ -137,7 +140,7 @@ local function register_biomes()
 		node_top = "mcl_core:dirt_with_grass_snow",
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
-		depth_filler = 1,
+		depth_filler = 2,
 		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 5,
@@ -166,7 +169,7 @@ local function register_biomes()
 		node_top = "mcl_core:dirt_with_grass",
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
-		depth_filler = 1,
+		depth_filler = 2,
 		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 6,
@@ -296,7 +299,7 @@ local function register_biomes()
 		node_top = "mcl_core:redsand",
 		depth_top = 1,
 		node_filler = "mcl_core:redsand",
-		depth_filler = 1,
+		depth_filler = 2,
 		node_stone = "mcl_core:redsandstone",
 		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
@@ -326,7 +329,7 @@ local function register_biomes()
 		node_top = "mcl_core:redsand",
 		depth_top = 1,
 		node_filler = "mcl_core:redsand",
-		depth_filler = 1,
+		depth_filler = 2,
 		node_riverbed = "mcl_core:redsand",
 		depth_riverbed = 2,
 		y_min = 0,
@@ -356,7 +359,7 @@ local function register_biomes()
 		node_top = "mcl_core:dirt_with_grass",
 		depth_top = 1,
 		node_filler = "mcl_core:dirt",
-		depth_filler = 1,
+		depth_filler = 2,
 		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
 		y_min = 1,