diff --git a/docs/observable-state.md b/docs/observable-state.md
index c752bc9af..3266d6e68 100644
--- a/docs/observable-state.md
+++ b/docs/observable-state.md
@@ -283,7 +283,7 @@ const plainMap = new Map(observableMap)
 ```
 
 To convert a data tree recursively to plain objects, the [`toJS`](api.md#tojs) utility can be used.
-For classes, it is recommend to implement a `toJSON()` method, as it will be picked up by `JSON.stringify`.
+For classes, it is recommended to implement a `toJSON()` method, as it will be picked up by `JSON.stringify`.
 
 ## A short note on classes