diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 04c666977..0083a6b03 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.29.27",
+    "version": "2.29.28",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/model/domain.ts b/packages/hydrooj/src/model/domain.ts
index 897750eb5..c3bb903b9 100644
--- a/packages/hydrooj/src/model/domain.ts
+++ b/packages/hydrooj/src/model/domain.ts
@@ -186,8 +186,8 @@ class DomainModel {
         if (udoc.priv & PRIV.PRIV_MANAGE_ALL_DOMAIN) dudoc.role = 'root';
         dudoc.role = dudoc.role || 'default';
         const ddoc = await DomainModel.get(domainId);
-        dudoc.perm = ddoc.roles[dudoc.role]
-            ? BigInt(ddoc.roles[dudoc.role])
+        dudoc.perm = ddoc?.roles[dudoc.role]
+            ? BigInt(ddoc?.roles[dudoc.role])
             : BUILTIN_ROLES[dudoc.role];
         return dudoc;
     }