Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -reff31263255b3a3441caff2955b4910f9ccc3656 -ra4f9ac570f88e76b70d2f818cd8f9157e4a83a74
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision eff31263255b3a3441caff2955b4910f9ccc3656)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision a4f9ac570f88e76b70d2f818cd8f9157e4a83a74)
@@ -620,7 +620,7 @@
             if ( message.crc == crc8( (U08*)(&message), sizeof(MESSAGE_HEADER_T) + message.msg.hdr.payloadLen ) )
             {
                 // if ACK, mark pending message ACK'd
-                if ( MSG_ID_ACK == message.msg.hdr.msgID )
+                if ( MSG_ID_ACK_MESSAGE_THAT_REQUIRES_ACK == message.msg.hdr.msgID )
                 {
                     matchACKtoPendingACKList( message.msg.hdr.seqNo );
                 }