diff --git a/lib/redmine/export/pdf.rb b/lib/redmine/export/pdf.rb
index 85beb8bdb..7dc622c66 100644
--- a/lib/redmine/export/pdf.rb
+++ b/lib/redmine/export/pdf.rb
@@ -93,7 +93,7 @@ module Redmine
           </style>'
 
           # Strip {{toc}} tags
-          txt = txt.gsub(/<p>\{\{([<>]?)toc\}\}<\/p>/i, '')
+          txt = txt.gsub(/<p>\{\{((<|&lt;)|(>|&gt;))?toc\}\}<\/p>/i, '')
           writeHTMLCell(w, h, x, y, css_tag + txt, border, ln, fill)
         end