Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -r64f53d733c47b490ade358157d85aa52a79b5188 -rad186fef9ecae0cee9c7656576b0b1c3e2077d2d
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 64f53d733c47b490ade358157d85aa52a79b5188)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision ad186fef9ecae0cee9c7656576b0b1c3e2077d2d)
@@ -56,7 +56,6 @@
 #define MAX_FPGA_CLOCK_SPEED_ERRORS             3                           ///< maximum number of FPGA clock speed errors within window period before alarm
 #define MAX_FPGA_CLOCK_SPEED_ERROR_WINDOW_MS    (10 * SEC_PER_MIN * MS_PER_SECOND)    ///< FPGA clock speed error window
 
-#define PENDING_ACK_LIST_OVERRIDE_HD_CHANNEL    1                                     ///< Value for determining UI or DG channel when Pending ACKs are overriden.
 #pragma pack(push, 1)
 
 /// Record for transmitted message that is pending acknowledgement from receiver.