diff --git a/beat/core/dock.py b/beat/core/dock.py
index a36e680f879795d67d54e3fbfabdefc3dbec5d87..fda2f2a6d51cfc12501c9f5819edb9e805f356bd 100755
--- a/beat/core/dock.py
+++ b/beat/core/dock.py
@@ -93,7 +93,7 @@ class Host(object):
 
 
   def __str__(self):
-    return self.kwargs['base_url']
+    return self.kwargs.get('base_url', 'Host')
 
 
   def env2docker(self, key):