diff --git a/Lib/python/pyrun.swg b/Lib/python/pyrun.swg
index 034e2c8ef..d49b92fc6 100644
--- a/Lib/python/pyrun.swg
+++ b/Lib/python/pyrun.swg
@@ -1004,7 +1004,8 @@ SWIG_Python_ConvertPtrAndOwn(PyObject *obj, void **ptr, swig_type_info *ty, int
 		    *ptr = vptr;
 		    /* transfer the ownership to 'ptr' */
 		    iobj->own = 0;
-		    res = SWIG_AddNewMask(SWIG_AddCast(res));		    
+		    res = SWIG_AddCast(res);
+		    res = SWIG_AddNewMask(res);
 		  } else {
 		    res = SWIG_AddCast(res);		    
 		  }