diff --git a/ccnode/node.py b/ccnode/node.py
index 31c9a9d74e476ea99929f13f13fc026d2c395e52..1ea6294a3cf54f281e75807b8499ee2b2d705b10 100644
--- a/ccnode/node.py
+++ b/ccnode/node.py
@@ -174,7 +174,7 @@ class RPCStartHandler(Thread):
             return  # we retry while it fails
 
         self.stop()
-        logger.info('Successfully authenticated with role %s', response)
+        logger.info('Successfully authenticated with role %s', str(response))
         self.auth_id = None