diff --git a/src/allmydata/webish.py b/src/allmydata/webish.py
index 8f36a6e15..b07d06be1 100644
--- a/src/allmydata/webish.py
+++ b/src/allmydata/webish.py
@@ -40,7 +40,6 @@ class TahoeLAFSRequest(Request, object):
         else, ``None``.
     """
     fields = None
-    _tahoe_request_had_error = None
 
     def requestReceived(self, command, path, version):
         """