diff --git a/src/guide/essentials/reactivity-fundamentals.md b/src/guide/essentials/reactivity-fundamentals.md
index ee38d11a77..f5402cdb69 100644
--- a/src/guide/essentials/reactivity-fundamentals.md
+++ b/src/guide/essentials/reactivity-fundamentals.md
@@ -301,7 +301,7 @@ export default {
-Refs can hold any value type, including deeply nested objects, arrays, or JavaScript built-in data structures like `Map`.
+Refs can hold any value type or reference type, including deeply nested objects, arrays, or JavaScript built-in data structures like `Map`.
A ref will make its value deeply reactive. This means you can expect changes to be detected even when you mutate nested objects or arrays: