diff --git a/lib/chunks/engines.rb b/lib/chunks/engines.rb
index 4f11608b..474329a8 100644
--- a/lib/chunks/engines.rb
+++ b/lib/chunks/engines.rb
@@ -42,7 +42,8 @@ module Engines
     def mask
       require_dependency 'maruku'
       require_dependency 'maruku/ext/math'
-      html = Maruku.new(@content.delete("\r\x01-\x08\x0B\x0C\x0E-\x1F"), {:math_enabled => false}).to_html
+      html = sanitize_rexml(Maruku.new(@content.delete("\r\x01-\x08\x0B\x0C\x0E-\x1F"),
+            {:math_enabled => false}).to_html_tree)
       sanitize_xhtml(html.to_ncr)
     end
   end
@@ -53,10 +54,8 @@ module Engines
     def mask
       require_dependency 'maruku'
       require_dependency 'maruku/ext/math'
-#      html = sanitize_rexml(Maruku.new(@content.delete("\r\x01-\x08\x0B\x0C\x0E-\x1F"),
-#            {:math_enabled => true, :math_numbered => ['\\[','\\begin{equation}']}).to_html_tree)
-      html = sanitize_xhtml(Maruku.new(@content.delete("\r\x01-\x08\x0B\x0C\x0E-\x1F"),
-            {:math_enabled => true, :math_numbered => ['\\[','\\begin{equation}']}).to_html.to_ncr)
+      html = sanitize_rexml(Maruku.new(@content.delete("\r\x01-\x08\x0B\x0C\x0E-\x1F"),
+            {:math_enabled => true, :math_numbered => ['\\[','\\begin{equation}']}).to_html_tree)
     end
   end