--- openflow-2011-10-12.h	2015-07-23 09:54:16.592479339 -0700
+++ openflow-2011-10-12-2.h	2015-07-23 09:54:16.596479339 -0700
@@ -1018,6 +1018,8 @@
     OFPGMFC_UNKNOWN_GROUP,            /* Group not modified because a group
                                          MODIFY attempted to modify a
                                          non-existent group. */
+    OFPGMFC_CHAINED_GROUP,            /* Group not deleted because another
+                                         group is forwarding to it. */
 };
 
 /* ofp_error_msg 'code' values for OFPET_PORT_MOD_FAILED.  'data' contains