1 files changed, 0 insertions, 1 deletions

diff --git a/include/opkele/types.h b/include/opkele/types.h
index 64f165c..bf50e2b 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -107,33 +107,32 @@ namespace opkele {
              */
             virtual bool stateless() const = 0;
             /**
              * check whether the association is expired.
              * @return true if expired
              */
             virtual bool is_expired() const = 0;
     };
 
     /**
      * the shared_ptr<> for association_t object type
      */
     typedef tr1mem::shared_ptr<association_t> assoc_t;
 
     class basic_message {
         public:
-            typedef list<string> fields_t;
             typedef util::forward_iterator_proxy<
                 string,const string&,const string*
                 > fields_iterator;
 
             basic_message() { }
             virtual ~basic_message() { }
             basic_message(const basic_message& x);
             void copy_to(basic_message& x) const;
             void append_to(basic_message& x) const;
 
             virtual bool has_field(const string& n) const = 0;
             virtual const string& get_field(const string& n) const = 0;
 
             virtual fields_iterator fields_begin() const = 0;
             virtual fields_iterator fields_end() const = 0;