diff --git a/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Compatibility/ILuaCsHook.cs b/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Compatibility/ILuaCsHook.cs
index 69e57544d..7dfdb8291 100644
--- a/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Compatibility/ILuaCsHook.cs
+++ b/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Compatibility/ILuaCsHook.cs
@@ -8,9 +8,9 @@ public interface ILuaCsHook : ILuaPatcher, ILuaCsShim
 {
     // Event Services
     [Obsolete("ACsMod is deprecated. Use ILuaEventService.Add() instead.")]
-    void Add(string eventName, string identifier, LuaCsFunc callback);
+    void Add(string eventName, string identifier, LuaCsFunc callback, object owner = null);
     [Obsolete("ACsMod is deprecated. Use ILuaEventService.Add() instead.")]
-    void Add(string eventName, LuaCsFunc callback);
+    void Add(string eventName, LuaCsFunc callback, object owner = null);
     // Does anyone use this? TODO: Analyze old Lua mods for usage scenarios.
     //bool Exists(string eventName, string identifier);
     object Call(string eventName, params object[] args);
diff --git a/Barotrauma/BarotraumaShared/SharedSource/LuaCs/_Services/EventService.cs b/Barotrauma/BarotraumaShared/SharedSource/LuaCs/_Services/EventService.cs
index 8803ca2c8..0323fad08 100644
--- a/Barotrauma/BarotraumaShared/SharedSource/LuaCs/_Services/EventService.cs
+++ b/Barotrauma/BarotraumaShared/SharedSource/LuaCs/_Services/EventService.cs
@@ -103,7 +103,7 @@ public partial class EventService : IEventService
 
     #region LuaEventSystem
 
-    public void Add(string eventName, string identifier, LuaCsFunc callback)
+    public void Add(string eventName, string identifier, LuaCsFunc callback, object owner = null)
     {
         Guard.IsNotNullOrWhiteSpace(eventName, nameof(eventName));
         Guard.IsNotNullOrWhiteSpace(identifier, nameof(identifier));
@@ -123,7 +123,7 @@ public partial class EventService : IEventService
         }
     }
 
-    public void Add(string eventName, LuaCsFunc callback)
+    public void Add(string eventName, LuaCsFunc callback, object owner = null)
     {
         // random ident, we hope for no conflicts :barodev:.
         Add(eventName, Random.Shared.NextInt64().ToString() ,callback);