diff --git a/packages/hydrooj/src/handler/manage.ts b/packages/hydrooj/src/handler/manage.ts
index 0b5ac01fc..d11cd22ad 100644
--- a/packages/hydrooj/src/handler/manage.ts
+++ b/packages/hydrooj/src/handler/manage.ts
@@ -276,7 +276,7 @@ class SystemUserImportHandler extends SystemHandler {
                     Object.assign(payload, {
                         email, username, password, displayName,
                     });
-                    await this.ctx.serial('user/import/parse', payload);
+                    await this.ctx.serial('user/import/parse', payload, messages);
                     udocs.push(payload);
                 }
             } else messages.push(`Line ${+i + 1}: Input invalid.`);
diff --git a/packages/hydrooj/src/service/bus.ts b/packages/hydrooj/src/service/bus.ts
index ddf2bbca3..69a505c1d 100644
--- a/packages/hydrooj/src/service/bus.ts
+++ b/packages/hydrooj/src/service/bus.ts
@@ -47,7 +47,7 @@ export interface EventMap {
     'user/get': (udoc: User) => void;
     'user/delcache': (content: string | true) => void;
 
-    'user/import/parse': (payload: any) => VoidReturn;
+    'user/import/parse': (payload: any, messages: string[]) => VoidReturn;
     'user/import/create': (uid: number, udoc: any) => VoidReturn;
 
     'domain/create': (ddoc: DomainDoc) => VoidReturn;