diff --git a/longs/models.py b/longs/models.py
index 31247498..eeaa1e8c 100644
--- a/longs/models.py
+++ b/longs/models.py
@@ -620,4 +620,6 @@ class CidUserAnswer(models.Model):
             return True
 
     def get_answer_score(self):
-        return self.score
+        if self.score == "":
+            return ""
+        return float(self.score)