diff --git a/backend/app/services/alert_service.py b/backend/app/services/alert_service.py
index c65bb10..7ad67e5 100644
--- a/backend/app/services/alert_service.py
+++ b/backend/app/services/alert_service.py
@@ -1,5 +1,6 @@
 from typing import List, Dict, Any, Optional
 from sqlalchemy.orm import Session
+from sqlalchemy import func
 from datetime import datetime, timedelta
 import logging
 import json
@@ -80,7 +81,7 @@ class AlertService:
         subquery = db.query(
             ARPEntry.ip_address
         ).group_by(ARPEntry.ip_address).having(
-            db.func.count(db.func.distinct(ARPEntry.mac_address)) > 1
+            func.count(func.distinct(ARPEntry.mac_address)) > 1
         ).subquery()
 
         conflict_entries = db.query(ARPEntry).filter(