diff --git a/ui/implements/components/scoreEditor.py b/ui/implements/components/scoreEditor.py
index ad15b60..dbf7375 100644
--- a/ui/implements/components/scoreEditor.py
+++ b/ui/implements/components/scoreEditor.py
@@ -302,7 +302,7 @@ class ScoreEditor(Ui_ScoreEditor, QWidget):
 
         if score.score is None:
             flags |= ScoreValidateResult.ScoreIncomplete
-        elif score.pure is None or score.far is None:
+        elif score.pure is None or score.far is None or score.lost is None:
             flags |= ScoreValidateResult.ScoreIncompleteForValidate
         elif self.__chart.notes is not None:
             score_range = calculate_score_range(