diff --git a/lib/modules/firestore/DocumentSnapshot.js b/lib/modules/firestore/DocumentSnapshot.js
index ea8e4394..ccff97a6 100644
--- a/lib/modules/firestore/DocumentSnapshot.js
+++ b/lib/modules/firestore/DocumentSnapshot.js
@@ -40,7 +40,7 @@ export default class DocumentSnapshot {
   }
 
   get metadata(): SnapshotMetadata {
-    return _metadata;
+    return this._metadata;
   }
 
   get ref(): DocumentReference {