--- openflow-2009-06-22.h	2015-07-23 09:54:15.672479302 -0700
+++ openflow-2009-06-25.h	2015-07-23 09:54:15.676479302 -0700
@@ -122,7 +122,11 @@
 
     /* Statistics messages. */
     OFPT_STATS_REQUEST,       /* Controller/switch message */
-    OFPT_STATS_REPLY          /* Controller/switch message */
+    OFPT_STATS_REPLY,         /* Controller/switch message */
+
+    /* Barrier messages. */
+    OFPT_BARRIER_REQUEST,     /* Controller/switch message */
+    OFPT_BARRIER_REPLY        /* Controller/switch message */
 };
 
 /* Header on all OpenFlow packets. */