diff --git a/flaml/tune/searcher/flow2.py b/flaml/tune/searcher/flow2.py
index 397a70be5..0ce79280d 100644
--- a/flaml/tune/searcher/flow2.py
+++ b/flaml/tune/searcher/flow2.py
@@ -412,7 +412,7 @@ class FLOW2(Searcher):
             if obj:
                 obj = (
                     {
-                        k: obj[k] * -1 if m == "max" else obj[k]
+                        k: -obj[k] if m == "max" else obj[k]
                         for k, m in zip(
                             self.lexico_objectives["metrics"],
                             self.lexico_objectives["modes"],