diff --git a/gns3server/handlers/api/qemu_handler.py b/gns3server/handlers/api/qemu_handler.py
index 74102dbe..7905be0a 100644
--- a/gns3server/handlers/api/qemu_handler.py
+++ b/gns3server/handlers/api/qemu_handler.py
@@ -254,7 +254,7 @@ class QEMUHandler:
         qemu_manager = Qemu.instance()
         vm = qemu_manager.get_vm(request.match_info["vm_id"], project_id=request.match_info["project_id"])
         nio = qemu_manager.create_nio(vm.qemu_path, request.json)
-        vm.adapter_add_nio_binding(int(request.match_info["adapter_number"]), int(request.match_info["port_number"]), nio)
+        yield from vm.adapter_add_nio_binding(int(request.match_info["adapter_number"]), int(request.match_info["port_number"]), nio)
         response.set_status(201)
         response.json(nio)
 
@@ -277,7 +277,7 @@ class QEMUHandler:
 
         qemu_manager = Qemu.instance()
         vm = qemu_manager.get_vm(request.match_info["vm_id"], project_id=request.match_info["project_id"])
-        vm.adapter_remove_nio_binding(int(request.match_info["adapter_number"]), int(request.match_info["port_number"]))
+        yield from vm.adapter_remove_nio_binding(int(request.match_info["adapter_number"]), int(request.match_info["port_number"]))
         response.set_status(204)
 
     @classmethod