1 files changed, 1 insertions, 1 deletions

diff --git a/include/opkele/types.h b/include/opkele/types.h
index a3b657d..1f48362 100644
--- a/include/opkele/types.h
+++ b/include/opkele/types.h
@@ -147,13 +147,13 @@ namespace opkele {
             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;
+            virtual void to_htmlhiddens(ostream& o,const char* pfx=0) const;
 
             void add_to_signed(const string& fields);
             string find_ns(const string& uri,const char *pfx) const;
             string allocate_ns(const string& uri,const char *pfx);
     };