Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -re832be54a818fe1af79b225e4b43cd148be89fa4 -ra265ac3cc10384a1119240d21f57833c9cb33c5b
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision e832be54a818fe1af79b225e4b43cd148be89fa4)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision a265ac3cc10384a1119240d21f57833c9cb33c5b)
@@ -795,7 +795,7 @@
     // If we've reached our target fill to volume (by weight), we're done filling - go back to generation idle mode  // SRSDG 398
     if ( TRUE == hasTargetFillVolumeBeenReached( inactiveReservoir ) )
     {
-        F32 filledVolumeML                           = getReservoirWeight( inactiveReservoir ) - reservoirBaseWeight;
+        F32 filledVolumeML                           = getReservoirWeight( inactiveRsrvr ) - reservoirBaseWeight;
         F32 integratedVolumeToLoadCellReadingPercent = fabs( 1.0F - ( filledVolumeML / getIntegratedVolumeML() ) );
         F32 avgAcidConductivity                      = acidConductivityTotal / conductivitySampleCount;
         F32 avgBicarbConductivity                    = bicarbConductivityTotal / conductivitySampleCount;