--- openflow-2011-10-03-2.h	2015-07-23 09:54:16.572479338 -0700
+++ openflow-2011-09-29.h	2015-07-23 09:54:16.576479339 -0700
@@ -754,7 +754,8 @@
 enum ofp_flow_mod_flags {
     OFPFF_SEND_FLOW_REM = 1 << 0,  /* Send flow removed message when flow
                                     * expires or is deleted. */
-    OFPFF_CHECK_OVERLAP = 1 << 1   /* Check for overlapping entries first. */
+    OFPFF_CHECK_OVERLAP = 1 << 1,  /* Check for overlapping entries first. */
+    OFPFF_RESET_COUNTS  = 1 << 2   /* Reset flow packet and byte counts. */
 };
 
 /* Flow setup and teardown (controller -> datapath). */