Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -r0237b2fc49d60b6602bac35ce43831b37f294c81 -r5070f8552a200e15dcc2ca0532db10fba9dc8c6b
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 0237b2fc49d60b6602bac35ce43831b37f294c81)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 5070f8552a200e15dcc2ca0532db10fba9dc8c6b)
@@ -1515,14 +1515,16 @@
                 handleHDSoftwareResetRequest( message );
                 break;
 
+#ifdef USE_FMB_FLOW_SENSOR
             case MSG_ID_BLOOD_FLOW_SIG_STRENGTH_OVERRIDE:
                 handleTestBloodFlowSignalStrengthOverrideRequest( message );
                 break;
-
+#endif
+#ifdef USE_FMD_FLOW_SENSOR
             case MSG_ID_DIAL_IN_FLOW_SIG_STRENGTH_OVERRIDE:
                 handleTestDialInFlowSignalStrengthOverrideRequest( message );
                 break;
-
+#endif
             case MSG_ID_BLOOD_PUMP_HOME_CMD:
                 handleTestBloodPumpHomeRequest( message );
                 break;