diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md
index 12ef28668d..5107038e80 100644
--- a/guides/source/form_helpers.md
+++ b/guides/source/form_helpers.md
@@ -238,7 +238,7 @@ end
 The corresponding view `app/views/articles/new.html.erb` using `form_for` looks like this:
 
 ```erb
-<%= form_for @article, url: {action: "create"}, html => {class: "nifty_form"} do |f| %>
+<%= form_for @article, url: {action: "create"}, html: {class: "nifty_form"} do |f| %>
   <%= f.text_field :title %>
   <%= f.text_area :body, size: "60x12" %>
   <%= f.submit "Create" %>