Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -r0237b2fc49d60b6602bac35ce43831b37f294c81 -r5070f8552a200e15dcc2ca0532db10fba9dc8c6b
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 0237b2fc49d60b6602bac35ce43831b37f294c81)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 5070f8552a200e15dcc2ca0532db10fba9dc8c6b)
@@ -436,8 +436,10 @@
 // MSG_ID_BLOOD_FLOW_MEAS_OVERRIDE
 void handleTestBloodFlowMeasuredOverrideRequest( MESSAGE_T *message );
 
+#ifdef USE_FMB_FLOW_SENSOR
 // MSG_ID_BLOOD_FLOW_SIG_STRENGTH_OVERRIDE
 void handleTestBloodFlowSignalStrengthOverrideRequest( MESSAGE_T *message );
+#endif
 
 // MSG_ID_BLOOD_PUMP_MC_MEAS_SPEED_OVERRIDE
 void handleTestBloodPumpMCMeasuredSpeedOverrideRequest( MESSAGE_T *message );
@@ -463,8 +465,10 @@
 // MSG_ID_DIAL_IN_FLOW_MEAS_OVERRIDE
 void handleTestDialInFlowMeasuredOverrideRequest( MESSAGE_T *message );
 
+#ifdef USE_FMD_FLOW_SENSOR
 // MSG_ID_DIAL_IN_FLOW_SIG_STRENGTH_OVERRIDE
 void handleTestDialInFlowSignalStrengthOverrideRequest( MESSAGE_T *message );
+#endif
 
 // MSG_ID_DIAL_IN_PUMP_MC_MEAS_SPEED_OVERRIDE
 void handleTestDialInPumpMCMeasuredSpeedOverrideRequest( MESSAGE_T *message );