diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py
index 18b12b6f69..9814a2241c 100644
--- a/synapse/handlers/e2e_keys.py
+++ b/synapse/handlers/e2e_keys.py
@@ -1029,7 +1029,7 @@ class E2eKeysHandler(object):
                 502, "Invalid %s key retrieved from remote server" % (key_type,)
             )
 
-        logger.info("***Finally returning %s - %s - %s")
+        logger.info("***Finally returning %s - %s - %s", key, key_id, verify_key)
         return key, key_id, verify_key
 
     @defer.inlineCallbacks