--- openflow-2012-01-25.h	2015-07-23 09:54:17.012479356 -0700
+++ openflow-2012-02-22.h	2015-07-23 09:54:17.020479357 -0700
@@ -1293,8 +1293,8 @@
     OFPM_MAX        = 0xffff0000,
 
     /* Virtual meters. */
-    OFPM_SLOWPATH   = 0xfffffffd,  /* Meter for slow datapath. */
-    OFPM_CONTROLLER = 0xfffffffe,  /* Meter for controller datapath. */
+    OFPM_SLOWPATH   = 0xfffffffd,  /* Meter for slow datapath, if any. */
+    OFPM_CONTROLLER = 0xfffffffe,  /* Meter for controller connection. */
     OFPM_ALL        = 0xffffffff,  /* Represents all meters for stat requests
                                       commands. */
 };