Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -rf0ea13c1a9908920793be07a946dc366d2ab5019 -r421336466eff4ba9fef0ca5416043e5d83c63841
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision f0ea13c1a9908920793be07a946dc366d2ab5019)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 421336466eff4ba9fef0ca5416043e5d83c63841)
@@ -110,6 +110,7 @@
     { MSG_ID_DD_PRESSURES_DATA,                                         &setDialysatePressure },
     { MSG_ID_UI_TREATMENT_PARAMS_TO_VALIDATE,                           &validateAndSetTreatmentParameters },
     { MSG_ID_UI_ULTRAFILTRATION_VOLUME_TO_VALIDATE,                     &validateAndSetUFVolume },
+    { MSG_ID_UI_ULTRAFILTRATION_CHANGE_VALIDATE_REQUEST,                &signalUserConfirmationOfUFVolume },
     { MSG_ID_UI_TREATMENT_PARAMS_CONFIRMED,                             &signalUserConfirmationOfTreatmentParameters },
     { MSG_ID_UI_DURATION_VALIDATE_REQUEST,                              &validateAndSetTreatmentDuration },
     { MSG_ID_UI_DURATION_CONFIRM_REQUEST,                               &signalUserConfirmationOfTreatmentDuration },