diff --git a/typescript/base/pane.ts b/typescript/base/pane.ts
index c5e2f0b87c..bb042a767e 100644
--- a/typescript/base/pane.ts
+++ b/typescript/base/pane.ts
@@ -1,11 +1,11 @@
 import { _Widget } from "../core/widget";
 
 export interface _Pane extends _Widget {
-    _assertTip: (..._args: any[]) => void;
-    loading: (..._args: any[]) => void;
-    loaded: (..._args: any[]) => void;
-    check: (..._args: any[]) => void;
-    populate: (items: any[]) => void;
+    _assertTip(..._args: any[]): void;
+    loading(..._args: any[]): void;
+    loaded(..._args: any[]): void;
+    check(..._args: any[]): void;
+    populate(...args: any[]): void;
 }
 
 export interface _PaneStatic {