diff --git a/actionpack/lib/action_view/vendor/html-scanner/html/selector.rb b/actionpack/lib/action_view/vendor/html-scanner/html/selector.rb
index 1eadfc0390..60b6783b19 100644
--- a/actionpack/lib/action_view/vendor/html-scanner/html/selector.rb
+++ b/actionpack/lib/action_view/vendor/html-scanner/html/selector.rb
@@ -160,7 +160,7 @@ module HTML
   # * <tt>:not(selector)</tt> -- Match the element only if the element does not
   #   match the simple selector.
   #
-  # As you can see, <tt>:nth-child<tt> pseudo class and its variant can get quite
+  # As you can see, <tt>:nth-child</tt> pseudo class and its variant can get quite
   # tricky and the CSS specification doesn't do a much better job explaining it.
   # But after reading the examples and trying a few combinations, it's easy to
   # figure out.