diff --git a/packages/runtime-core/src/apiWatch.ts b/packages/runtime-core/src/apiWatch.ts
index bc10547824e..037fd4568b0 100644
--- a/packages/runtime-core/src/apiWatch.ts
+++ b/packages/runtime-core/src/apiWatch.ts
@@ -112,7 +112,7 @@ export function watchSyncEffect(
 // initial value for watchers to trigger on undefined initial values
 const INITIAL_WATCHER_VALUE = {}
 
-type MultiWatchSources = (WatchSource<unknown> | object)[]
+export type MultiWatchSources = (WatchSource<unknown> | object)[]
 
 // overload: single source + cb
 export function watch<T, Immediate extends Readonly<boolean> = false>(
diff --git a/packages/runtime-core/src/index.ts b/packages/runtime-core/src/index.ts
index 94b2985040a..43c7b2d3c51 100644
--- a/packages/runtime-core/src/index.ts
+++ b/packages/runtime-core/src/index.ts
@@ -214,6 +214,7 @@ export type {
   Raw,
 } from '@vue/reactivity'
 export type {
+  MultiWatchSources,
   WatchEffect,
   WatchOptions,
   WatchOptionsBase,