diff --git a/src/main/java/com/volmit/iris/core/nms/v19_2/CustomBiomeSource.java b/src/main/java/com/volmit/iris/core/nms/v19_2/CustomBiomeSource.java
index bfb3f2ddc..5bc9b063f 100644
--- a/src/main/java/com/volmit/iris/core/nms/v19_2/CustomBiomeSource.java
+++ b/src/main/java/com/volmit/iris/core/nms/v19_2/CustomBiomeSource.java
@@ -143,7 +143,7 @@ public class CustomBiomeSource extends BiomeSource {
 
     @Override
     public Holder<Biome> getNoiseBiome(int x, int y, int z, Climate.Sampler sampler) {
-        IrisBiome ib = engine.getBiome(x << 2, y << 2, z << 2);
+        IrisBiome ib = engine.getBiome(x << 2, (y - engine.getMinHeight()) << 2, z << 2);
         if(ib.isCustom()) {
             return customBiomes.get(ib.getCustomBiome(rng, x << 2, 0, z << 2).getId());
         } else {