diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index 312c7d7..e05e697 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -114,6 +114,7 @@
 	struct {
 		/* Connection tracking fields. */
 		u16 zone;
+		u32 mark;
 		u8 state;
 	} ct;