diff --git a/front/src/Phaser/Map/ITiledMap.ts b/front/src/Phaser/Map/ITiledMap.ts
index 22a8ef86..d962648c 100644
--- a/front/src/Phaser/Map/ITiledMap.ts
+++ b/front/src/Phaser/Map/ITiledMap.ts
@@ -78,8 +78,8 @@ export interface ITiledMapTileLayer {
     width: number;
     x: number;
     y: number;
-    parallaxx: number;
-    parallaxy: number;
+    parallaxx?: number;
+    parallaxy?: number;
 
     /**
      * Draw order (topdown (default), index)