diff --git a/app/masks/build.ts b/app/masks/build.ts
index 36ced6adf..10c09ad75 100644
--- a/app/masks/build.ts
+++ b/app/masks/build.ts
@@ -4,7 +4,9 @@ import { CN_MASKS } from "./cn";
 import { TW_MASKS } from "./tw";
 import { EN_MASKS } from "./en";
 
-const BUILTIN_MASKS: BuiltinMask[] = {
+import { type BuiltinMask } from "./typing";
+
+const BUILTIN_MASKS: Record<string, BuiltinMask[]> = {
   cn: CN_MASKS,
   tw: TW_MASKS,
   en: EN_MASKS,