diff --git a/src/api/reactivity-core.md b/src/api/reactivity-core.md
index ce671e1cbb..dc0bf947c8 100644
--- a/src/api/reactivity-core.md
+++ b/src/api/reactivity-core.md
@@ -35,7 +35,7 @@ Takes an inner value and returns a reactive and mutable ref object, which has a
   const count = ref(0)
   console.log(count.value) // 0
 
-  count.value++
+  count.value = 1
   console.log(count.value) // 1
   ```