diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index 98523c10e8..ed163d5e2b 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -87,6 +87,7 @@ local function register_biomes()
 		depth_filler = 3,
 		node_riverbed = "mcl_core:sand",
 		depth_riverbed = 2,
+		node_stone = "mcl_core:sandstone",
 		y_min = 1,
 		y_max = 31000,
 		heat_point = 100,
@@ -101,6 +102,7 @@ local function register_biomes()
 		depth_filler = 3,
 		node_riverbed = "mcl_core:redsand",
 		depth_riverbed = 2,
+		node_stone = "mcl_core:hardened_clay",
 		y_min = 1,
 		y_max = 5,
 		heat_point = 100,
@@ -115,6 +117,7 @@ local function register_biomes()
 		depth_filler = 1,
 		node_riverbed = "mcl_core:redsand",
 		depth_riverbed = 2,
+		node_stone = "mcl_core:hardened_clay",
 		y_min = 1,
 		y_max = 5,
 		heat_point = 100,