Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -r19a8bf98a7154e24c35da25225d4b55bf70ddd09 -r99415e8a0738b8fc7582382222aca4cd61590423
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 19a8bf98a7154e24c35da25225d4b55bf70ddd09)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 99415e8a0738b8fc7582382222aca4cd61590423)
@@ -594,7 +594,7 @@
 
             // Calculate the time out value that must passed prior to checking for the steady state volume in the reservoir
             primeDialysateDialyzerTimeLimit = (U32)( ( ( DIALYSATE_DIALYZER_TUBE_VOLUME_ML + dialyzerDialysateVolume ) * SEC_PER_MIN * MS_PER_SECOND ) / DIALYSATE_PUMP_PRIME_FLOW_RATE_ML_MIN );
-            minimumReservoirVolume = getLoadCellWeight( LOAD_CELL_RESERVOIR_2_PRIMARY );
+            minimumReservoirVolume = getLoadCellWeight( LOAD_CELL_RESERVOIR_1_PRIMARY );
             steadyVolumeCount = 0;
             steadyVolumeSamplingStartTime = getMSTimerCount();
             primeDialysateDialyzerStartTime = getMSTimerCount();