--- openflow-2015-01-28.h	2015-07-23 09:54:18.120479402 -0700
+++ openflow-2015-03-11.h	2015-07-23 09:54:18.124479402 -0700
@@ -1988,9 +1988,9 @@
 
 /* Meter commands */
 enum ofp_meter_mod_command {
-    OFPMC_ADD,              /* New meter. */
-    OFPMC_MODIFY,           /* Modify specified meter. */
-    OFPMC_DELETE,           /* Delete specified meter. */
+    OFPMC_ADD    = 0,       /* New meter. */
+    OFPMC_MODIFY = 1,       /* Modify specified meter. */
+    OFPMC_DELETE = 2,       /* Delete specified meter. */
 };
 
 /* Meter configuration flags */