diff --git a/dtool/src/interrogate/interfaceMakerPythonNative.cxx b/dtool/src/interrogate/interfaceMakerPythonNative.cxx
index 98dcf9b0dd..f7ff85a3e2 100755
--- a/dtool/src/interrogate/interfaceMakerPythonNative.cxx
+++ b/dtool/src/interrogate/interfaceMakerPythonNative.cxx
@@ -612,7 +612,7 @@ void   InterfaceMakerPythonNative::GetValideChildClasses( std::map< std::string
         CPPStructType *base_type = TypeManager::resolve_type(base._base)->as_struct_type();
         if(base_type != NULL)
         {
-            std::string scoped_name = base_type->get_fully_scoped_name();
+            std::string scoped_name = base_type->get_local_name(&parser);
 
             if(answer.find(scoped_name) == answer.end())
             {