diff --git a/programs/js_operation_serializer/main.cpp b/programs/js_operation_serializer/main.cpp
index a5eda145..980231e8 100644
--- a/programs/js_operation_serializer/main.cpp
+++ b/programs/js_operation_serializer/main.cpp
@@ -109,9 +109,9 @@ template<typename T> struct js_name< fc::safe<T> > { static std::string name(){
 
 
 template<> struct js_name< std::vector<char> > { static std::string name(){ return "bytes()";     } };
-template<> struct js_name< op_wrapper >        { static std::string name(){ return "operation "; } };
 template<> struct js_name<fc::uint160>         { static std::string name(){ return "bytes 20";   } };
 template<> struct js_name<fc::sha224>          { static std::string name(){ return "bytes 28";   } };
+template<> struct js_name<fc::sha256>          { static std::string name(){ return "bytes 32";   } };
 template<> struct js_name<fc::unsigned_int>    { static std::string name(){ return "varuint32";  } };
 template<> struct js_name<fc::signed_int>      { static std::string name(){ return "varint32";   } };
 template<> struct js_name< vote_id_type >      { static std::string name(){ return "vote_id";    } };