diff --git a/vendor/plugins/maruku/lib/maruku/output/to_html.rb b/vendor/plugins/maruku/lib/maruku/output/to_html.rb
index fb9b9a9c..d0fff196 100644
--- a/vendor/plugins/maruku/lib/maruku/output/to_html.rb
+++ b/vendor/plugins/maruku/lib/maruku/output/to_html.rb
@@ -389,7 +389,7 @@ It is copied as a standard HTML attribute.
 	
 	HTML4Attributes = {}
 	
-	coreattrs = [:id, :class, :style, :title]
+	coreattrs = [:id, :class, :style, :title, :accesskey, :contenteditable, :dir, :draggable, :spellcheck, :tabindex]
 	i18n = [:lang, 'xml:lang'.to_sym]
 	events = [
 		:onclick, :ondblclick, :onmousedown, :onmouseup, :onmouseover,