--- openflow-2012-12-04.h	2015-07-23 09:54:17.472479375 -0700
+++ openflow-2013-01-16-3.h	2015-07-23 09:54:17.476479375 -0700
@@ -1667,6 +1667,7 @@
     OFPBIC_BAD_EXP_TYPE     = 6, /* Unknown instruction for experimenter id. */
     OFPBIC_BAD_LEN          = 7, /* Length problem in instructions. */
     OFPBIC_EPERM            = 8, /* Permissions error. */
+    OFPBIC_DUP_INST         = 9, /* Duplicate instruction. */
 };
 
 /* ofp_error_msg 'code' values for OFPET_BAD_MATCH.  'data' contains at least