diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 4739beead8..c98b0b5d52 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -4071,7 +4071,7 @@ qemuDomainChangeNet(virQEMUDriver *driver,
                 goto cleanup;
             }
         } else {
-            if (virDomainInterfaceClearQoS(vm->def, newdev) < 0)
+            if (virDomainInterfaceClearQoS(vm->def, olddev) < 0)
                 goto cleanup;
         }