diff --git a/CEP/PyBDSM/src/c++/aux.h b/CEP/PyBDSM/src/c++/aux.h
new file mode 100644
index 0000000000000000000000000000000000000000..bbe83206dd65bcadf5d0a05ad986d6a74d16c11a
--- /dev/null
+++ b/CEP/PyBDSM/src/c++/aux.h
@@ -0,0 +1,32 @@
+#ifndef _AUX_H_INCLUDED
+#define _AUX_H_INCLUDED
+
+/*!
+	\file aux.h
+	
+	\ingroup pybdsm
+
+	\brief Miscellaneous usefull routines
+*/
+
+#include <boost/version.hpp>
+#include <boost/python.hpp>
+#include <boost/python/detail/api_placeholder.hpp>
+
+#if BOOST_VERSION > 103200
+#define ADD_PROPERTY1(name, get, doc) .add_property(name, get, doc)
+#define ADD_PROPERTY2(name, get, set, doc) .add_property(name, get, set, doc)
+#else
+#define ADD_PROPERTY1(name, get, doc) .add_property(name, get)
+#define ADD_PROPERTY2(name, get, set, doc) .add_property(name, get, set)
+#endif
+
+inline void py_assert(bool cond, PyObject *exc, const char *msg)
+{
+  if(!cond) {
+    PyErr_SetString(exc, msg);
+    throw boost::python::error_already_set();
+  }
+}
+
+#endif // _AUX_H_INCLUDED