1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/handlers/groups_local.py b/synapse/handlers/groups_local.py
index 7cb106e365..ecdb12a7bf 100644
--- a/synapse/handlers/groups_local.py
+++ b/synapse/handlers/groups_local.py
@@ -70,7 +70,7 @@ class GroupsLocalWorkerHandler(object):
         self.clock = hs.get_clock()
         self.keyring = hs.get_keyring()
         self.is_mine_id = hs.is_mine_id
-        self.signing_key = hs.config.signing_key[0]
+        self.signing_key = hs.signing_key
         self.server_name = hs.hostname
         self.notifier = hs.get_notifier()
         self.attestations = hs.get_groups_attestation_signing()