diff --git a/app/services/order_service.py b/app/services/order_service.py
index 2536cd4b..bb90c53f 100644
--- a/app/services/order_service.py
+++ b/app/services/order_service.py
@@ -858,6 +858,7 @@ class OrderService:
         status: str | None = None,
         channel: str | None = None,
         search: str | None = None,
+        customer_id: int | None = None,
     ) -> tuple[list[Order], int]:
         """
         Get orders for vendor with filtering.
@@ -870,6 +871,7 @@ class OrderService:
             status: Filter by status
             channel: Filter by channel (direct, letzshop)
             search: Search by order number, customer name, or email
+            customer_id: Filter by customer ID
 
         Returns:
             Tuple of (orders, total_count)
@@ -882,6 +884,9 @@ class OrderService:
         if channel:
             query = query.filter(Order.channel == channel)
 
+        if customer_id:
+            query = query.filter(Order.customer_id == customer_id)
+
         if search:
             search_term = f"%{search}%"
             query = query.filter(