diff --git a/packages/core/src/oauth.js b/packages/core/src/oauth.js
index 4a51284..2651ae1 100644
--- a/packages/core/src/oauth.js
+++ b/packages/core/src/oauth.js
@@ -563,6 +563,7 @@ export function getLoopbackClientMetadata(clientId) {
   //
   // A client_id carrying no such parameter keeps its old reading — itself as
   // its redirect URI — so this only ever admits a client that was refused.
+  /** @type {string[]} */
   let redirectUris = [];
   let scope = 'atproto';
   try {