diff --git a/generator/shellimplgenerator.cpp b/generator/shellimplgenerator.cpp
index dfd27b4..4122e4c 100644
--- a/generator/shellimplgenerator.cpp
+++ b/generator/shellimplgenerator.cpp
@@ -125,9 +125,9 @@ void ShellImplGenerator::write(QTextStream &s, const AbstractMetaClass *meta_cla
       AbstractMetaArgumentList args = fun->arguments();
 
       s << "if (_wrapper) {" << endl;
-      s << "  PyObject* obj = PyObject_GetAttrString((PyObject*)_wrapper, \"" << fun->name() << "\");" << endl;
-      s << "  PyErr_Clear();" << endl;
-      s << "  if (obj && !PythonQtSlotFunction_Check(obj)) {" << endl;
+      s << "  static PyObject* name = PyString_FromString(\"" << fun->name() << "\");" << endl;
+      s << "  PyObject* obj = PyBaseObject_Type.tp_getattro((PyObject*)_wrapper, name);" << endl;
+      s << "  if (obj) {" << endl;
       s << "    static const char* argumentList[] ={\"";
       if (hasReturnValue) {
         // write the arguments, return type first
@@ -176,6 +176,8 @@ void ShellImplGenerator::write(QTextStream &s, const AbstractMetaClass *meta_cla
       } else {
         s << "    return;" << endl;
       }
+      s << "  } else {" << endl;
+      s << "    PyErr_Clear();" << endl;
       s << "  }" << endl;
       s << "}" << endl;