diff --git a/include/sqlpp11/custom_query.h b/include/sqlpp11/custom_query.h
index 662891dd..9c77bc72 100644
--- a/include/sqlpp11/custom_query.h
+++ b/include/sqlpp11/custom_query.h
@@ -73,13 +73,13 @@ namespace sqlpp
 		static void _check_consistency() {};
 
 		template<typename Db>
-		auto _run(Db& db) const	-> decltype(_methods_t::_run(db, *this))
+		auto _run(Db& db) const	-> decltype(std::declval<_methods_t>()._run(db, *this))
 		{
 			return _methods_t::_run(db, *this);
 		}
 
 		template<typename Db>
-		auto _prepare(Db& db) const	-> decltype(_methods_t::_prepare(db, *this))
+		auto _prepare(Db& db) const	-> decltype(std::declval<_methods_t>()._prepare(db, *this))
 		{
 			return _methods_t::_prepare(db, *this);
 		}
diff --git a/include/sqlpp11/select_column_list.h b/include/sqlpp11/select_column_list.h
index 0a6fa6bf..ad40bf44 100644
--- a/include/sqlpp11/select_column_list.h
+++ b/include/sqlpp11/select_column_list.h
@@ -305,7 +305,7 @@ namespace sqlpp
 
 					template<typename Db>
 						auto _run(Db& db) const
-						-> result_t<decltype(db.select(_get_statement())), _result_row_t<Db>>
+						-> result_t<decltype(db.select(std::declval<_statement_t>())), _result_row_t<Db>>
 						{
 							_statement_t::_check_consistency();
 							static_assert(_statement_t::_get_static_no_of_parameters() == 0, "cannot run select directly with parameters, use prepare instead");