Index: HDDefs.h
===================================================================
diff -u -r7173ec09a4aca263fb333951b10af24de4338fcb -r1fbf59d02583c8d4ffd219c35d3d2a1126b2df04
--- HDDefs.h	(.../HDDefs.h)	(revision 7173ec09a4aca263fb333951b10af24de4338fcb)
+++ HDDefs.h	(.../HDDefs.h)	(revision 1fbf59d02583c8d4ffd219c35d3d2a1126b2df04)
@@ -783,6 +783,7 @@
     HD_EVENT_UF_RATE_TX_DUR,                                            ///< HD event UF rate changes in treatment duration.
     HD_EVENT_UF_RATE_TIME_TX_DUR,                                       ///< HD event UF rate time difference in treatment duration.
     HD_EVENT_AIR_TRAP_STATE_CHANGE,                                     ///< HD event air trap state change.
+    HD_EVENT_AIR_TRAP_VALVE_ON_OFF,                                     ///< HD event air trap valve on or off.
     NUM_OF_EVENT_IDS                                                    ///< Total number of HD events
 };
 typedef enum HD_Event_List HD_EVENT_ID_T;                               ///< Type for HD event list enumeration