diff --git a/novaclient/client.py b/novaclient/client.py
index b2c003795..de85905ab 100644
--- a/novaclient/client.py
+++ b/novaclient/client.py
@@ -741,6 +741,7 @@ def discover_extensions(version):
 def _discover_via_python_path():
     for (module_loader, name, _ispkg) in pkgutil.iter_modules():
         if name.endswith('_python_novaclient_ext'):
+            # NOTE(sdague): needed for python 2.x compatibility.
             if not hasattr(module_loader, 'load_module'):
                 module_loader = module_loader.find_module(name)
             module = module_loader.load_module(name)