Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r82bd1d24c050e79690a7f5b236e49dd7db7e2a91 -r943d8be36db108f59b7839aafc975735191ab24e
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 82bd1d24c050e79690a7f5b236e49dd7db7e2a91)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 943d8be36db108f59b7839aafc975735191ab24e)
@@ -3387,7 +3387,7 @@
     memcpy( payloadPtr, &reject_reason, sizeof( U32 ) );
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
-    serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_NOT_REQUIRED );
+    serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
 }
 
 /*********************************************************************//**