diff --git a/src/utils/valueUtil.ts b/src/utils/valueUtil.ts
index a17c068c..104fce74 100644
--- a/src/utils/valueUtil.ts
+++ b/src/utils/valueUtil.ts
@@ -10,7 +10,7 @@ import { toArray } from './typeUtil';
  * 123 => [123]
  * ['a', 123] => ['a', 123]
  */
-export function getNamePath(path: NamePath | null): (string | number)[] {
+export function getNamePath(path: NamePath | null): InternalNamePath {
   return toArray(path);
 }