diff --git a/docs/tutorials/essentials/part-4-using-data.md b/docs/tutorials/essentials/part-4-using-data.md
index f9216d2a79..b3945942b0 100644
--- a/docs/tutorials/essentials/part-4-using-data.md
+++ b/docs/tutorials/essentials/part-4-using-data.md
@@ -55,7 +55,7 @@ export const SinglePostPage = ({ match }) => {
   const { postId } = match.params
 
   const post = useSelector(state =>
-    state.posts.find(post => post.id === postId)
+    state.posts.find(post => post.id.toString() === postId)
   )
 
   if (!post) {