diff --git a/modules/modpython/cstring.i b/modules/modpython/cstring.i
index bc081f7e..7e9ddf4c 100644
--- a/modules/modpython/cstring.i
+++ b/modules/modpython/cstring.i
@@ -74,12 +74,21 @@ SWIG_AsVal_CString (PyObject * obj, CString *val)
 }
 /*@SWIG@*/
 /*@SWIG:/swig/3.0.8/typemaps/CStrings.swg,38,%CString_from@*/
-%fragment("SWIG_" "From" "_" {CString},"header",fragment="SWIG_FromCharPtrAndSize") {
+%fragment("SWIG_" "From" "_" {CString},"header",fragment="SWIG_FromCharPtrAndSize", fragment="StdTraits") {
 SWIGINTERNINLINE PyObject *
 SWIG_From_CString  (const CString& s)
 {
   return SWIG_FromCharPtrAndSize(s.data(), s.size());
 }
+
+namespace swig {
+    template<>
+        struct traits_from<CString> {
+            static PyObject* from(const CString& s) {
+                return SWIG_From_CString(s);
+            }
+        };
+}
 }
 /*@SWIG@*/