diff --git a/judge/contest_format/ecoo.py b/judge/contest_format/ecoo.py
index 0451c74..007498c 100644
--- a/judge/contest_format/ecoo.py
+++ b/judge/contest_format/ecoo.py
@@ -118,7 +118,7 @@ class ECOOContestFormat(DefaultContestFormat):
                 format_html(
                     "<small> +{bonus}</small>", bonus=floatformat(format_data["bonus"])
                 )
-                if format_data["bonus"]
+                if format_data.get("bonus")
                 else ""
             )