diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 316ca8bb5..80987884d 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.28.49",
+    "version": "2.28.50",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 79557a44b..8949d4c19 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -98,8 +98,8 @@ export class ProblemMainHandler extends ProblemHandler {
             system.get('pagination.problem'),
         );
         if (sort) pdocs = pdocs.sort((a, b) => sort.indexOf(a.docId) - sort.indexOf(b.docId));
-        if (q && +q) {
-            const pdoc = await problem.get(domainId, +q, problem.PROJECTION_LIST);
+        if (q) {
+            const pdoc = await problem.get(domainId, +q || q, problem.PROJECTION_LIST);
             if (pdoc) pdocs.filter((doc) => doc.docId !== pdoc.docId).unshift(pdoc);
         }
         if (this.user.hasPriv(PRIV.PRIV_USER_PROFILE)) {