--- openflow-2012-06-26-2.h	2015-07-23 09:54:17.508479377 -0700
+++ openflow-2012-12-07.h	2015-07-23 09:54:17.512479377 -0700
@@ -1379,7 +1379,7 @@
                                      output group.  A value of OFPG_ANY
                                      indicates no restriction. */
     uint16_t flags;               /* Bitmap of OFPFF_* flags. */
-    uint8_t pad[2];
+    uint16_t importance;          /* Eviction precedence (optional). */
     struct ofp_match match;       /* Fields to match. Variable size. */
     /* The variable size and padded match is always followed by instructions. */
     //struct ofp_instruction_header instructions[0];
@@ -2114,7 +2114,8 @@
     uint16_t idle_timeout;    /* Number of seconds idle before expiration. */
     uint16_t hard_timeout;    /* Number of seconds before expiration. */
     uint16_t flags;           /* Bitmap of OFPFF_* flags. */
-    uint8_t pad2[4];          /* Align to 64-bits. */
+    uint16_t importance;      /* Eviction precedence. */
+    uint8_t pad2[2];          /* Align to 64-bits. */
     uint64_t cookie;          /* Opaque controller-issued identifier. */
     uint64_t packet_count;    /* Number of packets in flow. */
     uint64_t byte_count;      /* Number of bytes in flow. */