diff --git a/src/main/java/mcp/mobius/betterbarrels/common/items/dolly/ItemBarrelMover.java b/src/main/java/mcp/mobius/betterbarrels/common/items/dolly/ItemBarrelMover.java
index 5eca2c8..b097d67 100644
--- a/src/main/java/mcp/mobius/betterbarrels/common/items/dolly/ItemBarrelMover.java
+++ b/src/main/java/mcp/mobius/betterbarrels/common/items/dolly/ItemBarrelMover.java
@@ -5,7 +5,9 @@
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 import net.minecraft.block.Block;
 import net.minecraft.client.renderer.texture.IIconRegister;
@@ -50,6 +52,9 @@ public class ItemBarrelMover extends Item {
     protected static ArrayList<String> classExtensionsNames = new ArrayList<String>();
     protected static HashMap<String, Class> classMap = new HashMap<String, Class>();
 
+    protected static ArrayList<String> spawnerClassExtensionsNames = new ArrayList<String>();
+    protected static Set<Class<?>> spawnerClasses = new HashSet<>();
+
     protected Method tagCompoundWrite = Utils.ReflectionHelper.getMethod(
             NBTTagCompound.class,
             new String[] { "a", "func_74734_a", "write" },
@@ -121,6 +126,15 @@ protected enum DollyType {
                 classExtensions.add(null);
             }
         }
+
+        spawnerClassExtensionsNames.add("chylex.hee.tileentity.TileEntityCustomSpawner");
+        spawnerClasses.add(TileEntityMobSpawner.class);
+
+        for (String s : spawnerClassExtensionsNames) {
+            try {
+                spawnerClasses.add(Class.forName(s));
+            } catch (ClassNotFoundException ignored) {}
+        }
     }
 
     public ItemBarrelMover() {
@@ -536,16 +550,11 @@ private boolean isTEMovable(TileEntity te) {
     }
 
     private static boolean tileIsASpawner(TileEntity te) {
-        if (te instanceof TileEntityMobSpawner) {
-            return true;
-        }
-
-        try {
-            Class<?> heeClass = Class.forName("chylex.hee.tileentity.TileEntityCustomSpawner");
-            if (heeClass.isInstance(te)) {
+        for (Class<?> c : spawnerClasses) {
+            if (c != null && c.isInstance(te)) {
                 return true;
             }
-        } catch (ClassNotFoundException ignored) {}
+        }
 
         return false;
     }