--- ../src-base/minecraft/net/minecraft/world/WorldType.java
+++ ../src-work/minecraft/net/minecraft/world/WorldType.java
@@ -19,6 +19,7 @@
 import net.minecraft.world.gen.layer.GenLayerZoom;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
+import net.minecraftforge.common.util.EnumHelper; // Cauldron
 
 public class WorldType
 {
@@ -49,6 +50,12 @@
         this.canBeCreated = true;
         this.worldTypeId = p_i1960_1_;
         worldTypes[p_i1960_1_] = this;
+        // Cauldron start - add worldtype for bukkit if it does not already exist
+        if (org.bukkit.WorldType.getByName(p_i1960_2_) == null)
+        {
+            EnumHelper.addBukkitWorldType(p_i1960_2_);
+        }
+        // Cauldron end
     }
 
     public String getWorldTypeName()