diff --git a/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/adapter/Regenerator.java b/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/adapter/Regenerator.java
index 576e88aab..84a2f5753 100644
--- a/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/adapter/Regenerator.java
+++ b/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/adapter/Regenerator.java
@@ -7,6 +7,7 @@ import com.fastasyncworldedit.core.queue.implementation.SingleThreadQueueExtent;
 import com.fastasyncworldedit.core.util.MathMan;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.bukkit.BukkitWorld;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.function.pattern.Pattern;
 import com.sk89q.worldedit.internal.util.LogManagerCompat;
@@ -283,7 +284,8 @@ public abstract class Regenerator<IChunkAccess, ProtoChunk extends IChunkAccess,
             });
         }
 
-        source = new SingleThreadQueueExtent(originalBukkitWorld.getMinHeight(), originalBukkitWorld.getMaxHeight());
+        source = new SingleThreadQueueExtent(BukkitWorld.HAS_MIN_Y ? originalBukkitWorld.getMinHeight() : 0,
+                BukkitWorld.HAS_MIN_Y ? originalBukkitWorld.getMaxHeight() : 256);
         source.init(target, initSourceQueueCache(), null);
         return true;
     }
diff --git a/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/regions/GriefPreventionFeature.java b/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/regions/GriefPreventionFeature.java
index c75349b76..b2c5a39b4 100644
--- a/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/regions/GriefPreventionFeature.java
+++ b/worldedit-bukkit/src/main/java/com/fastasyncworldedit/bukkit/regions/GriefPreventionFeature.java
@@ -3,6 +3,7 @@ package com.fastasyncworldedit.bukkit.regions;
 import com.fastasyncworldedit.core.regions.FaweMask;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.bukkit.BukkitWorld;
 import com.sk89q.worldedit.extension.platform.Capability;
 import com.sk89q.worldedit.internal.util.LogManagerCompat;
 import com.sk89q.worldedit.math.BlockVector3;
@@ -40,12 +41,12 @@ public class GriefPreventionFeature extends BukkitMaskManager implements Listene
                 claim.getGreaterBoundaryCorner().getBlockX();
                 final BlockVector3 pos1 = BlockVector3.at(
                         claim.getLesserBoundaryCorner().getBlockX(),
-                        player.getWorld().getMinHeight(),
+                        wePlayer.getWorld().getMinY(),
                         claim.getLesserBoundaryCorner().getBlockZ()
                 );
                 final BlockVector3 pos2 = BlockVector3.at(
                         claim.getGreaterBoundaryCorner().getBlockX(),
-                        player.getWorld().getMaxHeight(),
+                        wePlayer.getWorld().getMaxY(),
                         claim.getGreaterBoundaryCorner().getBlockZ()
                 );
                 return new FaweMask(new CuboidRegion(pos1, pos2)) {
diff --git a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java
index 379476ec8..a653bd7f5 100644
--- a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java
+++ b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java
@@ -85,7 +85,9 @@ public class BukkitWorld extends AbstractWorld {
     private static final Logger LOGGER = LogManagerCompat.getLogger();
 
     private static final boolean HAS_3D_BIOMES;
-    private static final boolean HAS_MIN_Y;
+    //FAWE start - allow access for easy checking if World#getMin/MaxHeight exists
+    public static final boolean HAS_MIN_Y;
+    //FAWE end
 
     private static final Map<Integer, Effect> effects = new HashMap<>();