diff --git a/typescript/base/pane.ts b/typescript/base/pane.ts
index 75c3fc9f0..c5e2f0b87 100644
--- a/typescript/base/pane.ts
+++ b/typescript/base/pane.ts
@@ -5,6 +5,7 @@ export interface _Pane extends _Widget {
     loading: (..._args: any[]) => void;
     loaded: (..._args: any[]) => void;
     check: (..._args: any[]) => void;
+    populate: (items: any[]) => void;
 }
 
 export interface _PaneStatic {