diff --git a/src/util/interfaces/Activity.ts b/src/util/interfaces/Activity.ts
index 0f3ea7276..97991cbba 100644
--- a/src/util/interfaces/Activity.ts
+++ b/src/util/interfaces/Activity.ts
@@ -65,6 +65,7 @@ export interface Activity {
         album_id?: string;
         artist_ids?: string[];
         type?: "track" | "episode";
+        label?: string; // undocumented
     };
     session_id?: string;
 }