diff --git a/libs/submissions_process.js b/libs/submissions_process.js
index 05e89c9..d20afc4 100644
--- a/libs/submissions_process.js
+++ b/libs/submissions_process.js
@@ -78,7 +78,7 @@ const processOverallResult = (source, config) => {
   return {
     compile: source.compile,
     judge: {
-      subtasks: source.judge.subtasks && source.judge.subtasks.map(st => ({
+      subtasks: source.judge ? source.judge.subtasks && source.judge.subtasks.map(st => ({
         score: st.score,
         cases: st.cases.map(cs => ({
           status: cs.status,
@@ -96,7 +96,7 @@ const processOverallResult = (source, config) => {
             spjMessage: config.showTestdata ? cs.result.spjMessage : undefined,
           }
         }))
-      }))
+      })) : null
     }
   };
 }