diff --git a/openflow_input/bsn_pktin_flag b/openflow_input/bsn_pktin_flag
index 54c942f..fd94a49 100644
--- a/openflow_input/bsn_pktin_flag
+++ b/openflow_input/bsn_pktin_flag
@@ -42,4 +42,5 @@
     OFP_BSN_PKTIN_FLAG_TTL_EXPIRED = 0x80,
     OFP_BSN_PKTIN_FLAG_L3_MISS = 0x100,
     OFP_BSN_PKTIN_FLAG_L3_CPU = 0x200,
+    OFP_BSN_PKTIN_FLAG_INGRESS_ACL = 0x400,
 };