diff --git a/packages/shared/useDebounce/index.ts b/packages/shared/useDebounce/index.ts
index 3f28660d902..d424285c570 100644
--- a/packages/shared/useDebounce/index.ts
+++ b/packages/shared/useDebounce/index.ts
@@ -1,7 +1,7 @@
 import { ref, Ref, watch } from 'vue-demi'
 import { useDebounceFn } from '../useDebounceFn'
 
-export function useDebounce<T>(value: Ref<T>, ms = 200): Ref<T> {
+export function useDebounce<T>(value: Ref<T>, ms = 200): Readonly<Ref<T>> {
   if (ms <= 0)
     return value