Index: firmware/App/Modes/BloodPrime.c
===================================================================
diff -u -r24209d3d77ebdd34dbf65b656959d28d975834bc -r5501a435ad36f528817eb7efb24fcb17ef3da68c
--- firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 24209d3d77ebdd34dbf65b656959d28d975834bc)
+++ firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 5501a435ad36f528817eb7efb24fcb17ef3da68c)
@@ -295,7 +295,7 @@
 
         bloodPrimePublishTimerCtr = 0;
         data.targetBloodPrimeVolumeMl = bloodPrimeTargetVolume_mL;
-        data.deliveredBloodPrimeVolumeMl = getBloodPrimeVolume();
+        data.deliveredBloodPrimeVolumeMl = MAX( 0.0, getBloodPrimeVolume() );
         broadcastData( MSG_ID_HD_BLOOD_PRIME_PROGRESS, COMM_BUFFER_OUT_CAN_HD_BROADCAST, (U08*)&data, sizeof( BLOOD_PRIME_DATA_PAYLOAD_T ) );
     }
 }