diff --git a/src/de/steamwar/bausystem/commands/CommandBau.java b/src/de/steamwar/bausystem/commands/CommandBau.java
index 67269f1..c9eb7f2 100644
--- a/src/de/steamwar/bausystem/commands/CommandBau.java
+++ b/src/de/steamwar/bausystem/commands/CommandBau.java
@@ -62,6 +62,10 @@ public class CommandBau implements CommandExecutor {
         if(!(sender instanceof Player))
             return false;
         Player player = (Player) sender;
+        if(!BauSystem.getOwner().equals(player.getUniqueId())){
+            player.sendMessage(BauSystem.PREFIX + "§cDies ist nicht deine Welt!");
+            return false;
+        }
 
         if(args[0].equalsIgnoreCase("togglebuild")){
             onToggleBD(player, args[1]);