Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -r2e6c750c202b7361d79488ce383e34f380e75413 -r169b72cc9c959b53b40b48e9ce0a5f4aeca1de97
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 2e6c750c202b7361d79488ce383e34f380e75413)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 169b72cc9c959b53b40b48e9ce0a5f4aeca1de97)
@@ -91,10 +91,8 @@
 
 // ********** public function prototypes **********
 
-#ifndef ACK_NOT_IMPLEMENTED
 // ACK MSG
 BOOL sendACKMsg( MESSAGE_T *message );
-#endif
 
 // MSG_ID_DG_CHECK_IN
 void handleDGCheckIn( MESSAGE_T *message );