--- openflow-2014-09-09.h	2015-07-23 09:54:17.780479388 -0700
+++ openflow-2014-09-10.h	2015-07-23 09:54:17.784479388 -0700
@@ -1435,8 +1435,8 @@
     uint16_t dst_offset;            /* Starting bit offset in destination. */
     uint8_t pad[2];                 /* Align to 32 bits. */
     /* Followed by:
-     *   - Exactly 64, 96 or 128 bytes containing the oxm_ids, then
-     *   - Enough 0-bytes (between 0 and 7) to make the action a whole
+     *   - Exactly 8, 12 or 16 bytes containing the oxm_ids, then
+     *   - Enough all-zero bytes (either 0 or 4) to make the action a whole
      *     multiple of 8 bytes in length */
     uint32_t         oxm_ids[0];   /* Source and destination OXM headers */
 };