diff --git a/bindings/pyroot/src/Utility.cxx b/bindings/pyroot/src/Utility.cxx
index ffeae8e..d3ba063 100644
--- a/bindings/pyroot/src/Utility.cxx
+++ b/bindings/pyroot/src/Utility.cxx
@@ -219,8 +219,10 @@ Bool_t PyROOT::Utility::AddToClass(
 Bool_t PyROOT::Utility::AddToClass( PyObject* pyclass, const char* label, const char* func )
 {
    PyObject* pyfunc = PyObject_GetAttrString( pyclass, const_cast< char* >( func ) );
-   if ( ! pyfunc )
+   if ( ! pyfunc ) {
+      PyErr_Clear();
       return kFALSE;
+   }
 
    Bool_t isOk = PyObject_SetAttrString( pyclass, const_cast< char* >( label ), pyfunc ) == 0;