diff --git a/neutron/common/log.py b/neutron/common/log.py
index 2c0e7af69d..fcc57b896a 100644
--- a/neutron/common/log.py
+++ b/neutron/common/log.py
@@ -29,6 +29,6 @@ def log(method):
                 "method_name": method.__name__,
                 "args": args[1:], "kwargs": kwargs}
         LOG.debug(_('%(class_name)s method %(method_name)s'
-                    'called with arguments %(args)s %(kwargs)s '), data)
+                    ' called with arguments %(args)s %(kwargs)s '), data)
         return method(*args, **kwargs)
     return wrapper