diff --git a/keyserver/internal/device_list_update.go b/keyserver/internal/device_list_update.go
index 2f967a40f..c5a5d40c7 100644
--- a/keyserver/internal/device_list_update.go
+++ b/keyserver/internal/device_list_update.go
@@ -373,7 +373,7 @@ func (u *DeviceListUpdater) processServer(serverName gomatrixserverlib.ServerNam
 				}
 			} else {
 				waitTime = time.Hour
-				logger.WithError(err).Warn("GetUserDevices returned unknown error type")
+				logger.WithError(err).WithField("user_id", userID).Warn("GetUserDevices returned unknown error type")
 			}
 			continue
 		}