Index: boost1.62-1.62.0+dfsg/libs/python/src/converter/builtin_converters.cpp
===================================================================
--- boost1.62-1.62.0+dfsg.orig/libs/python/src/converter/builtin_converters.cpp
+++ boost1.62-1.62.0+dfsg/libs/python/src/converter/builtin_converters.cpp
@@ -48,7 +48,7 @@ namespace
 #else
   void* convert_to_cstring(PyObject* obj)
   {
-      return PyUnicode_Check(obj) ? _PyUnicode_AsString(obj) : 0;
+      return PyUnicode_Check(obj) ? const_cast<void*>(reinterpret_cast<const void*>(_PyUnicode_AsString(obj))) : 0;
   }
 #endif