1 files changed, 2 insertions, 2 deletions

diff --git a/include/opkele/types.h b/include/opkele/types.h
index 1fab869..af7fb1a 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -130,26 +130,26 @@ namespace opkele {
             basic_openid_message(const basic_openid_message& x);
             void copy_to(basic_openid_message& x) const;
 
             virtual bool has_field(const string& n) const = 0;
             virtual const string& get_field(const string& n) const = 0;
 
             virtual bool has_ns(const string& uri) const;
             virtual string get_ns(const string& uri) const;
 
             virtual fields_iterator fields_begin() const = 0;
             virtual fields_iterator fields_end() const = 0;
 
-            virtual string append_query(const string& url) const;
-            virtual string query_string() const;
+            virtual string append_query(const string& url,const char *pfx="openid.") const;
+            virtual string query_string(const char *pfx="openid.") const;
 
 
             virtual void reset_fields();
             virtual void set_field(const string& n,const string& v);
             virtual void reset_field(const string& n);
 
             virtual void from_keyvalues(const string& kv);
             virtual void to_keyvalues(ostream& o) const;
 
             virtual void to_htmlhiddens(ostream& o,const char* pfx=0) const;
 
             void add_to_signed(const string& fields);