diff --git a/src/traditional.ts b/src/traditional.ts
index 0241596e..c855e588 100644
--- a/src/traditional.ts
+++ b/src/traditional.ts
@@ -3,6 +3,7 @@ import React from 'react'
 import useSyncExternalStoreExports from 'use-sync-external-store/shim/with-selector'
 import { createStore } from './vanilla.ts'
 import type {
+  ExtractState,
   Mutate,
   StateCreator,
   StoreApi,
@@ -11,8 +12,6 @@ import type {
 
 const { useSyncExternalStoreWithSelector } = useSyncExternalStoreExports
 
-type ExtractState<S> = S extends { getState: () => infer T } ? T : never
-
 type ReadonlyStoreApi<T> = Pick<
   StoreApi<T>,
   'getState' | 'getInitialState' | 'subscribe'