diff --git a/src/pya/pya/pya.cc b/src/pya/pya/pya.cc
index 57d1d10bb..8fd5c39ce 100644
--- a/src/pya/pya/pya.cc
+++ b/src/pya/pya/pya.cc
@@ -207,7 +207,7 @@ PythonInterpreter::PythonInterpreter (bool embedded)
 
   tl_assert (sizeof (wchar_t) == 2);
 
-  Py_SetPythonHome (L"");  //  really ignore $PYTHONHOME + without this, we get dummy error message about lacking path for libraries
+  Py_SetPythonHome ((wchar_t *) L"");  //  really ignore $PYTHONHOME + without this, we get dummy error message about lacking path for libraries
 
   const wchar_t *python_path = _wgetenv (L"KLAYOUT_PYTHONPATH");
   if (python_path) {