diff --git a/jointjs/jointjs.d.ts b/jointjs/jointjs.d.ts
index 403cb5c79..eb03edbc7 100644
--- a/jointjs/jointjs.d.ts
+++ b/jointjs/jointjs.d.ts
@@ -78,7 +78,7 @@ declare module joint {
             findViewByModel(modelOrId:any):CellView;
             findViewsFromPoint(p:{ x: number; y: number; }):CellView[];
             findViewsInArea(r:{ x: number; y: number; width: number; height: number; }):CellView[];
-            fitToContent(): void;
+            fitToContent(opt?:any): void;
         }
 
         class ElementView extends CellView {