diff --git a/src/nitro/session/IRoomSession.ts b/src/nitro/session/IRoomSession.ts
index 6a8116a6..20341709 100644
--- a/src/nitro/session/IRoomSession.ts
+++ b/src/nitro/session/IRoomSession.ts
@@ -5,7 +5,7 @@ import { UserDataManager } from './UserDataManager';
 
 export interface IRoomSession extends IDisposable
 {
-    openGift(_Str_1577: number): void;
+    openGift(objectId: number): void;
     setConnection(connection: IConnection): void;
     setControllerLevel(level: number): void;
     setOwnRoomIndex(roomIndex: number): void;
diff --git a/src/nitro/session/RoomSession.ts b/src/nitro/session/RoomSession.ts
index 61d43077..87239c33 100644
--- a/src/nitro/session/RoomSession.ts
+++ b/src/nitro/session/RoomSession.ts
@@ -257,9 +257,9 @@ export class RoomSession extends Disposable implements IRoomSession
         this._connection.send(new MoodlightSettingsComposer());
     }
 
-    public openGift(_Str_1577: number): void
+    public openGift(objectId: number): void
     {
-        this._connection.send(new OpenPresentComposer(_Str_1577));
+        this._connection.send(new OpenPresentComposer(objectId));
     }
 
     public get connection(): IConnection
diff --git a/src/nitro/session/events/RoomSessionPetPackageEvent.ts b/src/nitro/session/events/RoomSessionPetPackageEvent.ts
index 845f19d6..72f06e43 100644
--- a/src/nitro/session/events/RoomSessionPetPackageEvent.ts
+++ b/src/nitro/session/events/RoomSessionPetPackageEvent.ts
@@ -21,7 +21,7 @@ export class RoomSessionPetPackageEvent extends RoomSessionEvent
         this._nameValidationInfo = _arg_6;
     }
 
-    public get _Str_1577(): number
+    public get objectId(): number
     {
         return this._objectId;
     }
diff --git a/src/room/renderer/RoomSpriteCanvas.ts b/src/room/renderer/RoomSpriteCanvas.ts
index 1cce93c6..28021979 100644
--- a/src/room/renderer/RoomSpriteCanvas.ts
+++ b/src/room/renderer/RoomSpriteCanvas.ts
@@ -429,7 +429,7 @@ export class RoomSpriteCanvas implements IRoomRenderingCanvas
         }
 
         const cache = this.getCacheItem(identifier);
-        cache._Str_1577 = object.instanceId;
+        cache.objectId = object.instanceId;
 
         const locationCache = cache.location;
         const sortableCache = cache.sprites;
diff --git a/src/room/renderer/cache/RoomObjectCache.ts b/src/room/renderer/cache/RoomObjectCache.ts
index 66af0995..c080769c 100644
--- a/src/room/renderer/cache/RoomObjectCache.ts
+++ b/src/room/renderer/cache/RoomObjectCache.ts
@@ -79,7 +79,7 @@ export class RoomObjectCache
                 {
                     const data = new RoomObjectSpriteData();
 
-                    data.objectId   = item._Str_1577;
+                    data.objectId   = item.objectId;
                     data.x          = sprite.x;
                     data.y          = sprite.y;
                     data.z          = sprite.z;
@@ -145,4 +145,4 @@ export class RoomObjectCache
 
         return sprites;
     }
-}
\ No newline at end of file
+}
diff --git a/src/room/renderer/cache/RoomObjectCacheItem.ts b/src/room/renderer/cache/RoomObjectCacheItem.ts
index 8bcc0afe..9b2dfffe 100644
--- a/src/room/renderer/cache/RoomObjectCacheItem.ts
+++ b/src/room/renderer/cache/RoomObjectCacheItem.ts
@@ -40,13 +40,13 @@ export class RoomObjectCacheItem
         }
     }
 
-    public get _Str_1577(): number
+    public get objectId(): number
     {
         return this._objectId;
     }
 
-    public set _Str_1577(k:number)
+    public set objectId(k:number)
     {
         this._objectId = k;
     }
-}
\ No newline at end of file
+}