diff --git a/include/sqlpp11/extra_tables.h b/include/sqlpp11/extra_tables.h
index 4b25a04f..82b54fd7 100644
--- a/include/sqlpp11/extra_tables.h
+++ b/include/sqlpp11/extra_tables.h
@@ -60,8 +60,6 @@ namespace sqlpp
 				using _extra_tables = ::sqlpp::detail::type_set<Tables...>;
 			};
 
-			using _recursive_traits = make_recursive_traits<Tables...>;
-
 			// FIXME: extra_tables must not require tables!
 
 			static_assert(sizeof...(Tables), "at least one table or join argument required in extra_tables()");
diff --git a/include/sqlpp11/insert.h b/include/sqlpp11/insert.h
index d1f82eb2..b6ca7ff2 100644
--- a/include/sqlpp11/insert.h
+++ b/include/sqlpp11/insert.h
@@ -56,7 +56,7 @@ namespace sqlpp
 				}
 
 				template<typename Db>
-					auto _run(Db& db) const -> decltype(db.insert(_get_statement()))
+					auto _run(Db& db) const -> decltype(db.insert(this->_get_statement()))
 					{
 						_statement_t::_check_consistency();
 
diff --git a/include/sqlpp11/into.h b/include/sqlpp11/into.h
index 2454528a..de2e2214 100644
--- a/include/sqlpp11/into.h
+++ b/include/sqlpp11/into.h
@@ -108,7 +108,7 @@ namespace sqlpp
 					}
 
 					template<typename Db>
-						auto _run(Db& db) const -> decltype(db.insert(_get_statement()))
+						auto _run(Db& db) const -> decltype(db.insert(this->_get_statement()))
 						{
 							_statement_t::_check_consistency();
 
diff --git a/include/sqlpp11/remove.h b/include/sqlpp11/remove.h
index d3bc1142..1c067f09 100644
--- a/include/sqlpp11/remove.h
+++ b/include/sqlpp11/remove.h
@@ -57,7 +57,7 @@ namespace sqlpp
 				}
 
 				template<typename Db>
-					auto _run(Db& db) const -> decltype(db.remove(_get_statement()))
+					auto _run(Db& db) const -> decltype(db.remove(this->_get_statement()))
 					{
 						_statement_t::_check_consistency();
 
diff --git a/include/sqlpp11/select_column_list.h b/include/sqlpp11/select_column_list.h
index 602bcf3f..41cb5f06 100644
--- a/include/sqlpp11/select_column_list.h
+++ b/include/sqlpp11/select_column_list.h
@@ -284,7 +284,7 @@ namespace sqlpp
 					// Execute
 					template<typename Db>
 						auto _run(Db& db) const
-						-> result_t<decltype(db.select(_get_statement())), _result_row_t<Db>>
+						-> result_t<decltype(db.select(this->_get_statement())), _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");
diff --git a/include/sqlpp11/statement.h b/include/sqlpp11/statement.h
index b5e1bc5a..ea40ee3b 100644
--- a/include/sqlpp11/statement.h
+++ b/include/sqlpp11/statement.h
@@ -110,7 +110,7 @@ namespace sqlpp
 
 				struct _recursive_traits
 				{
-					using _required_tables = _required_tables;
+					using _required_tables = statement_policies_t::_required_tables;
 					using _provided_tables = detail::type_set<>;
 					using _extra_tables = detail::type_set<>;
 					using _parameters = detail::make_parameter_tuple_t<parameters_of<Policies>...>;
diff --git a/include/sqlpp11/update.h b/include/sqlpp11/update.h
index 58bb2b74..f6ddd15b 100644
--- a/include/sqlpp11/update.h
+++ b/include/sqlpp11/update.h
@@ -57,7 +57,7 @@ namespace sqlpp
 				}
 
 				template<typename Db>
-					auto _run(Db& db) const -> decltype(db.update(_get_statement()))
+					auto _run(Db& db) const -> decltype(db.update(this->_get_statement()))
 					{
 						_statement_t::_check_consistency();