diff --git a/backend/dao/user.js b/backend/dao/user.js
index 2aaef624c..d9395512c 100644
--- a/backend/dao/user.js
+++ b/backend/dao/user.js
@@ -135,8 +135,13 @@ class UsersDAO {
       punctuation,
       rawWpm,
       wpm,
+      funbox,
     } = result;
 
+    if (funbox !== "none" && funbox !== "plus_one" && funbox !== "plus_two") {
+      return false;
+    }
+
     let pb = checkAndUpdatePb(
       user.personalBests,
       mode,