diff --git a/include/boost/contract/oldof.hpp b/include/boost/contract/oldof.hpp
new file mode 100644
index 0000000..63252ce
--- /dev/null
+++ b/include/boost/contract/oldof.hpp
@@ -0,0 +1,10 @@
+
+#ifndef BOOST_CONTRACT_OLDOF_HPP_
+#define BOOST_CONTRACT_OLDOF_HPP_
+
+#include <boost/contract/ext_/preprocessor/traits/oldof.hpp>
+
+#define BOOST_CONTRACT_OLDOF BOOST_CONTRACT_EXT_PP_TRAITS_OLDOF_OPERATOR
+
+#endif // #include guard
+