diff --git a/synapse/groups/attestations.py b/synapse/groups/attestations.py
index 4656e854f..c060cff5d 100644
--- a/synapse/groups/attestations.py
+++ b/synapse/groups/attestations.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import logging
+
 from twisted.internet import defer
 
 from synapse.api.errors import SynapseError
@@ -22,6 +24,9 @@ from synapse.util.logcontext import preserve_fn
 from signedjson.sign import sign_json
 
 
+logger = logging.getLogger(__name__)
+
+
 # Default validity duration for new attestations we create
 DEFAULT_ATTESTATION_LENGTH_MS = 3 * 24 * 60 * 60 * 1000