diff --git a/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java b/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java
index 931b6c12b..2df85238a 100644
--- a/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java
+++ b/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java
@@ -22,6 +22,7 @@ public class AirSpawn extends Requirement {
         BiomeConfig c = wc.getBiome(b);
         if(y <= c.getOcean().getSeaLevel()) return false;
         ElevationEquation elevationEquation = ((UserDefinedGenerator) b.getGenerator()).getElevationEquation();
-        return b.getGenerator().getNoise(getNoise(), getWorld(), x, (int) (y - elevationEquation.getNoise(x, z, getWorld())), z) <= 0;
+        int yf = y - ((elevationEquation == null) ? 0 : (int) elevationEquation.getNoise(x, z, getWorld()));
+        return b.getGenerator().getNoise(getNoise(), getWorld(), x, yf, z) <= 0;
     }
 }
diff --git a/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java b/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java
index d97a884c1..6c6da9162 100644
--- a/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java
+++ b/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java
@@ -17,6 +17,7 @@ public class LandSpawn extends Requirement {
         TerraWorld tw = TerraWorld.getWorld(getWorld());
         UserDefinedBiome b = (UserDefinedBiome) tw.getGrid().getBiome(x, z, GenerationPhase.POPULATE);
         ElevationEquation elevationEquation = ((UserDefinedGenerator) b.getGenerator()).getElevationEquation();
-        return b.getGenerator().getNoise(getNoise(), getWorld(), x, (int) (y - elevationEquation.getNoise(x, z, getWorld())), z) > 0;
+        int yf = y - ((elevationEquation == null) ? 0 : (int) elevationEquation.getNoise(x, z, getWorld()));
+        return b.getGenerator().getNoise(getNoise(), getWorld(), x, yf, z) > 0;
     }
 }
diff --git a/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java b/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java
index d24139920..85249dbef 100644
--- a/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java
+++ b/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java
@@ -20,6 +20,7 @@ public class OceanSpawn extends Requirement {
         BiomeConfig c = tw.getConfig().getBiome(b);
         if(y > c.getOcean().getSeaLevel()) return false;
         ElevationEquation elevationEquation = ((UserDefinedGenerator) b.getGenerator()).getElevationEquation();
-        return b.getGenerator().getNoise(getNoise(), getWorld(), x, (int) (y - elevationEquation.getNoise(x, z, getWorld())), z) <= 0;
+        int yf = y - ((elevationEquation == null) ? 0 : (int) elevationEquation.getNoise(x, z, getWorld()));
+        return b.getGenerator().getNoise(getNoise(), getWorld(), x, yf, z) <= 0;
     }
 }