diff --git a/railties/guides/files/stylesheets/main.css b/railties/guides/files/stylesheets/main.css
index 3fee08143f..e7d184a4e5 100644
--- a/railties/guides/files/stylesheets/main.css
+++ b/railties/guides/files/stylesheets/main.css
@@ -497,6 +497,7 @@ code, pre {
     margin-top: 0.25em;
     display: block;
     min-height: 45px;
+    overflow: auto;
 }
 
 .note {