diff --git a/src/vnet/devices/tap/tapv2.api b/src/vnet/devices/tap/tapv2.api
index 861fe17..ccbbe15 100644
--- a/src/vnet/devices/tap/tapv2.api
+++ b/src/vnet/devices/tap/tapv2.api
@@ -28,6 +28,8 @@
 enum tap_flags {
         TAP_FLAG_GSO = 1,
         TAP_FLAG_CSUM_OFFLOAD = 2,
+	TAP_FLAG_PERSIST = 4,
+	TAP_FLAG_ATTACH = 8,
 };
 
 /** \brief Initialize a new tap interface with the given parameters