diff --git a/api/app/features/evaluation/judge_service.py b/api/app/features/evaluation/judge_service.py
index 6a17478..748ee41 100644
--- a/api/app/features/evaluation/judge_service.py
+++ b/api/app/features/evaluation/judge_service.py
@@ -263,7 +263,7 @@ def _build_memoir_judge_prompt(
             ]
         )
     if struct:
-        sections.extend(["【结构化记忆证据】", struct[:_MEMOIR_EVIDENCE_MAX], ""])
+        sections.extend(["【结构化记忆证据】", struct[:ev_cap], ""])
     else:
         sections.extend(
             [