diff --git a/include/fc/rpc/api_connection.hpp b/include/fc/rpc/api_connection.hpp
index fd67072..c037c22 100644
--- a/include/fc/rpc/api_connection.hpp
+++ b/include/fc/rpc/api_connection.hpp
@@ -112,14 +112,14 @@ namespace fc {
          template<typename R, typename Signature, typename ... Args>
          R call_generic( const std::function<R(std::function<Signature>,Args...)>& f, variants::const_iterator a0, variants::const_iterator e )
          {
-            FC_ASSERT( a0 != e );
+            FC_ASSERT( a0 != e, "too few arguments passed to method" );
             detail::callback_functor<Signature> arg0( *this, a0->as<uint64_t>() );
             return  call_generic<R,Args...>( this->bind_first_arg<R,std::function<Signature>,Args...>( f, std::function<Signature>(arg0) ), a0+1, e );
          }
          template<typename R, typename Signature, typename ... Args>
          R call_generic( const std::function<R(const std::function<Signature>&,Args...)>& f, variants::const_iterator a0, variants::const_iterator e )
          {
-            FC_ASSERT( a0 != e );
+            FC_ASSERT( a0 != e, "too few arguments passed to method" );
             detail::callback_functor<Signature> arg0( get_connection(), a0->as<uint64_t>() );
             return  call_generic<R,Args...>( this->bind_first_arg<R,const std::function<Signature>&,Args...>( f, arg0 ), a0+1, e );
          }
@@ -127,7 +127,7 @@ namespace fc {
          template<typename R, typename Arg0, typename ... Args>
          R call_generic( const std::function<R(Arg0,Args...)>& f, variants::const_iterator a0, variants::const_iterator e )
          {
-            FC_ASSERT( a0 != e );
+            FC_ASSERT( a0 != e, "too few arguments passed to method" );
             return  call_generic<R,Args...>( this->bind_first_arg<R,Arg0,Args...>( f, a0->as< typename std::decay<Arg0>::type >() ), a0+1, e );
          }