diff --git a/src/case/layer/pane.list.js b/src/case/layer/pane.list.js
index 28d618285..1b6530355 100644
--- a/src/case/layer/pane.list.js
+++ b/src/case/layer/pane.list.js
@@ -104,7 +104,7 @@ BI.ListPane = BI.inherit(BI.Pane, {
     },
 
     removeItemAt: function (indexes) {
-        indexes = indexes || [];
+        indexes = BI.isNull(indexes) ? [] : indexes;
         BI.removeAt(this.options.items, indexes);
         this.button_group.removeItemAt.apply(this.button_group, arguments);
         this.check();
diff --git a/typescript/case/layer/pane.list.ts b/typescript/case/layer/pane.list.ts
index 46c3f6bfe..bf800cf15 100644
--- a/typescript/case/layer/pane.list.ts
+++ b/typescript/case/layer/pane.list.ts
@@ -13,7 +13,7 @@ export declare class ListPane extends Pane {
 
     addItems<T>(items: T[]): void;
 
-    removeItemAt(indexes: number): void;
+    removeItemAt(indexes?: number | number[]): void;
 
     populate<T>(items?: T[]): void;