diff --git a/gns3server/api/routes/compute/iou_nodes.py b/gns3server/api/routes/compute/iou_nodes.py
index 1b456a97..f3b5b8fe 100644
--- a/gns3server/api/routes/compute/iou_nodes.py
+++ b/gns3server/api/routes/compute/iou_nodes.py
@@ -284,7 +284,7 @@ async def start_iou_node_capture(
     """
 
     pcap_file_path = os.path.join(node.project.capture_working_directory(), node_capture_data.capture_file_name)
-    await node.start_capture(adapter_number, pcap_file_path)
+    await node.start_capture(adapter_number, port_number, pcap_file_path)
     return {"pcap_file_path": str(pcap_file_path)}