--- openflow-2011-10-03-3.h	2015-07-23 09:54:16.660479342 -0700
+++ openflow-2011-10-04.h	2015-07-23 09:54:16.664479342 -0700
@@ -1011,7 +1011,7 @@
     uint32_t experimenter;      /* Experimenter ID which takes the same
                                    form as in struct ofp_experimenter_header. */
 };
-OFP_ASSERT(sizeof(struct ofp_match) == 8);
+OFP_ASSERT(sizeof(struct ofp_oxm_experimenter_header) == 8);
 
 
 /* ## ------------- ## */