diff --git a/src/core/index.ts b/src/core/index.ts
index 9bc09f5d16..b5419ddb53 100644
--- a/src/core/index.ts
+++ b/src/core/index.ts
@@ -25,5 +25,6 @@ export type {
   MutatorOptions,
   Middleware,
   Arguments,
-  State
+  State,
+  ScopedMutator
 } from '../_internal'