diff --git a/changelog.d/9098.misc b/changelog.d/9098.misc
new file mode 100644
index 000000000..907020d42
--- /dev/null
+++ b/changelog.d/9098.misc
@@ -0,0 +1 @@
+Fix the wrong arguments being passed to `BlacklistingAgentWrapper` from `MatrixFederationAgent`. Contributed by Timothy Leung.
diff --git a/synapse/http/federation/matrix_federation_agent.py b/synapse/http/federation/matrix_federation_agent.py
index 3b756a7dc..4c06a117d 100644
--- a/synapse/http/federation/matrix_federation_agent.py
+++ b/synapse/http/federation/matrix_federation_agent.py
@@ -102,7 +102,6 @@ class MatrixFederationAgent:
                         pool=self._pool,
                         contextFactory=tls_client_options_factory,
                     ),
-                    self._reactor,
                     ip_blacklist=ip_blacklist,
                 ),
                 user_agent=self.user_agent,