diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 0e12d51ee..34f9d1285 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -319,7 +319,7 @@ module ApplicationHelper
     unless groups.empty?
       s << %(<optgroup label="#{h(l(:label_group_plural))}">#{groups}</optgroup>)
     end
-    s
+    s.html_safe
   end
 
   # Truncates and returns the string as a single line