diff --git a/lib/ace/mode/html_highlight_rules.js b/lib/ace/mode/html_highlight_rules.js
index 26bca6df..ec631873 100644
--- a/lib/ace/mode/html_highlight_rules.js
+++ b/lib/ace/mode/html_highlight_rules.js
@@ -44,6 +44,7 @@ var tagMap = lang.createMap({
     img         : 'image',
     input       : 'form',
     label       : 'form',
+    option      : 'form',
     script      : 'script',
     select      : 'form',
     textarea    : 'form',