diff --git a/modules/mol/base/pymod/export_atom.cc b/modules/mol/base/pymod/export_atom.cc
index f232d498cc3f52d61419d0c441c59e530470f737..d623fffba7a42096608a5e7910c22aa3c116671e 100644
--- a/modules/mol/base/pymod/export_atom.cc
+++ b/modules/mol/base/pymod/export_atom.cc
@@ -62,6 +62,7 @@ void export_Atom()
                   &AtomBase::SetName)
     .add_property("index", &AtomBase::GetIndex)
     .def("GetRadius", &AtomBase::GetRadius)
+    .def("SetRadius", &AtomBase::SetRadius)
     .def("GetElement", &AtomBase::GetElement, 
          return_value_policy<copy_const_reference>())
     .def("SetElement", &AtomBase::SetElement)