diff --git a/types/global.d.ts b/types/global.d.ts
index e73f3077e..0b7c597e4 100644
--- a/types/global.d.ts
+++ b/types/global.d.ts
@@ -2,9 +2,9 @@ interface Obj {
     [key: string]: any;
 }
 
-// declare let BI: Obj & import("../typescript/index")._BI;
+declare let BI: Obj & import("../typescript/index")._BI;
 
-declare let BI: Obj;
+// declare let BI: Obj;
 
 declare const Fix: Obj;
 
diff --git a/typescript/index.ts b/typescript/index.ts
index 12f00f5be..16dfae441 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -42,4 +42,4 @@ export interface _BI extends _func, _i18n, _base {
 
 BI = BI.extend(BI, {
     Decorators: decorator,
-});
+}) as any;