diff --git a/acme_tiny.py b/acme_tiny.py
index d992d02d..2b5e4438 100755
--- a/acme_tiny.py
+++ b/acme_tiny.py
@@ -39,7 +39,7 @@ def _do_request(url, data=None, err_msg="Error", depth=0):
         try:
             resp_data = json.loads(resp_data) # try to parse json results
         except ValueError:
-            pass # ignore json parsing errors
+            resp_data = {'type':None, 'raw': resp_data}
         if depth < 100 and code == 400 and resp_data['type'] == "urn:ietf:params:acme:error:badNonce":
             raise IndexError(resp_data) # allow 100 retrys for bad nonces
         if code not in [200, 201, 204]: