--- a/mobile/android/services/src/main/java/org/mozilla/gecko/sync/repositories/domain/BookmarkRecord.java
+++ b/mobile/android/services/src/main/java/org/mozilla/gecko/sync/repositories/domain/BookmarkRecord.java
@@ -280,17 +280,17 @@ public class BookmarkRecord extends Reco
 
     // This field is marked as nullable, so we're careful when unboxing it. However, we do not expect
     // it to be null at this point, since it was constructed from our DB cursor which will always have
     // a `created` timestamp.
     // However, very old bookmarks that didn't have a corresponding history item might not have a
     // creation date. `created` is not a NOT NULL field in the bookmarks table. Either way, it pays
     // to be cautious here.
     if (this.dateAdded != null) {
-      putPayload(payload, "dateAdded", Long.toString(this.dateAdded));
+      payload.put("dateAdded", this.dateAdded);
     }
 
     if (isFolder()) {
       payload.put("children", this.children);
       return;
     }
 
     // bookmark, microsummary, query.