diff --git a/src/pya/pya/pya.cc b/src/pya/pya/pya.cc
index bc544e7f7..98b31ed2b 100644
--- a/src/pya/pya/pya.cc
+++ b/src/pya/pya/pya.cc
@@ -293,7 +293,7 @@ PythonInterpreter::PythonInterpreter (bool embedded)
           }
         }
 
-        Py_SetPath (tl::to_wstring (path).c_str ());
+        tl::set_env (pythonpath_name, path);
 
       }