diff --git a/packages/sonic/model.ts b/packages/sonic/model.ts
index c2345534..62cdc95f 100644
--- a/packages/sonic/model.ts
+++ b/packages/sonic/model.ts
@@ -22,6 +22,6 @@ bus.on('problem/del', async (domainId, docId) => {
 global.Hydro.lib.problemSearch = async (domainId: string, query: string) => {
     const c = system.get('pagination.problem');
     const docIds = await sonic.query('problem', `${domainId}@title`, query, { limit: c });
-    docIds.push(...await sonic.query('problem', `${domainId}@content`, query, { limit: c - docIds.length }));
+    if (c - docIds.length > 0) docIds.push(...await sonic.query('problem', `${domainId}@content`, query, { limit: c - docIds.length }));
     return docIds.map(Number);
 };
diff --git a/packages/sonic/package.json b/packages/sonic/package.json
index c25fb453..0036cc82 100644
--- a/packages/sonic/package.json
+++ b/packages/sonic/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/sonic",
-    "version": "1.0.2",
+    "version": "1.0.3",
     "description": "Sonic search service",
     "main": "service.js",
     "typings": "service.d.ts",