diff --git a/guides/code/getting_started/app/views/posts/_form.html.erb b/guides/code/getting_started/app/views/posts/_form.html.erb
index c9fb74af9c..f2f83585e1 100644
--- a/guides/code/getting_started/app/views/posts/_form.html.erb
+++ b/guides/code/getting_started/app/views/posts/_form.html.erb
@@ -1,6 +1,6 @@
 <%= form_for @post do |f| %>
   <% if @post.errors.any? %>
-  <div id="errorExplanation">
+  <div id="error_explanation">
     <h2><%= pluralize(@post.errors.count, "error") %> prohibited
       this post from being saved:</h2>
     <ul>
@@ -14,12 +14,12 @@
     <%= f.label :title %><br>
     <%= f.text_field :title %>
   </p>
- 
+
   <p>
     <%= f.label :text %><br>
     <%= f.text_area :text %>
   </p>
- 
+
   <p>
     <%= f.submit %>
   </p>
diff --git a/guides/source/getting_started.md b/guides/source/getting_started.md
index 0d44f0e776..a773519bba 100644
--- a/guides/source/getting_started.md
+++ b/guides/source/getting_started.md
@@ -793,7 +793,7 @@ something went wrong. To do that, you'll modify
 ```html+erb
 <%= form_for :post, url: posts_path do |f| %>
   <% if @post.errors.any? %>
-  <div id="errorExplanation">
+  <div id="error_explanation">
     <h2><%= pluralize(@post.errors.count, "error") %> prohibited
       this post from being saved:</h2>
     <ul>
@@ -862,7 +862,7 @@ it look as follows:
 
 <%= form_for :post, url: post_path(@post.id), method: :patch do |f| %>
   <% if @post.errors.any? %>
-  <div id="errorExplanation">
+  <div id="error_explanation">
     <h2><%= pluralize(@post.errors.count, "error") %> prohibited
       this post from being saved:</h2>
     <ul>
@@ -977,7 +977,7 @@ content:
 ```html+erb
 <%= form_for @post do |f| %>
   <% if @post.errors.any? %>
-  <div id="errorExplanation">
+  <div id="error_explanation">
     <h2><%= pluralize(@post.errors.count, "error") %> prohibited
       this post from being saved:</h2>
     <ul>