diff --git a/src/dark/core/prefab/machine/TileEntityInv.java b/src/dark/core/prefab/machine/TileEntityInv.java
index 731cb7c48..9d8562e7c 100644
--- a/src/dark/core/prefab/machine/TileEntityInv.java
+++ b/src/dark/core/prefab/machine/TileEntityInv.java
@@ -19,7 +19,7 @@ import dark.core.interfaces.IInvBox;
 import dark.core.prefab.invgui.InvChest;
 
 /** Prefab for simple object who only need basic inv support and nothing more
- * 
+ *
  * @author Darkguardsman */
 public class TileEntityInv extends TileEntityAdvanced implements IExternalInv, ISidedInventory, ISpecialAccess
 {
@@ -257,6 +257,10 @@ public class TileEntityInv extends TileEntityAdvanced implements IExternalInv, I
     @Override
     public AccessGroup getOwnerGroup()
     {
+        if (this.getGroup("owner") == null)
+        {
+            this.groups.add(new AccessGroup("owner"));
+        }
         return this.getGroup("owner");
     }