diff --git a/biome_defs.lua b/biome_defs.lua
index c080ed0..cc145b7 100644
--- a/biome_defs.lua
+++ b/biome_defs.lua
@@ -125,7 +125,10 @@ moretrees.willow_biome = {
 }
 
 moretrees.rubber_tree_biome = {
-	surface = "default:dirt_with_grass",
+	surface = {
+		"default:dirt_with_grass",
+		"default:sand",
+	},
 	avoid_nodes = moretrees.avoidnodes,
 	avoid_radius = 10,
 	seed_diff = 338,