diff --git a/backend/src/controllers/classroomController.js b/backend/src/controllers/classroomController.js
index 6007a28..a757817 100644
--- a/backend/src/controllers/classroomController.js
+++ b/backend/src/controllers/classroomController.js
@@ -3,6 +3,7 @@ const path = require('path');
 const fs   = require('fs');
 const crypto = require('crypto');
 const { emit, emitToClass, getOnlineUserIds, emitToGuests } = require('../sse');
+const { emitToUser } = require('../ws-server');
 
 /* ── chat attachment uploads dir ─────────────────────────────────────── */
 const CHAT_UPLOADS_DIR = path.join(__dirname, '../../uploads/chat');
@@ -359,7 +360,7 @@ function signal(req, res) {
   if (!hasAccess(session, req.user.id, req.user.role))
     return res.status(403).json({ error: 'Нет доступа' });
 
-  emit(target_user_id, {
+  emitToUser(target_user_id, {
     type: 'classroom_signal',
     sessionId,
     from: req.user.id,