diff --git a/openflow_input/bsn_pktin_flag b/openflow_input/bsn_pktin_flag
index b046024..b21616a 100644
--- a/openflow_input/bsn_pktin_flag
+++ b/openflow_input/bsn_pktin_flag
@@ -46,4 +46,5 @@
     OFP_BSN_PKTIN_FLAG_INGRESS_ACL = 0x400,
     OFP_BSN_PKTIN_FLAG_SFLOW = 0x800,
     OFP_BSN_PKTIN_FLAG_ARP_CACHE = 0x1000,
+    OFP_BSN_PKTIN_FLAG_ARP_TARGET = 0x2000,
 };