1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py

index b9ecdc2733..e658c68e23 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -791,7 +791,7 @@ class MatrixFederationHttpClient:
                                 url_str,
                                 _flatten_response_never_received(e),
                             )
-                            body = None
+                            body = b""
 
                         exc = HttpResponseException(
                             response.code, response_phrase, body