Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -r0e457429d65039d16cd631c3aaa06b5409de67c4 -r384a6d2d008cf97d3c90a7d66f5fa0ba47043869
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 0e457429d65039d16cd631c3aaa06b5409de67c4)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 384a6d2d008cf97d3c90a7d66f5fa0ba47043869)
@@ -559,7 +559,7 @@
     S32  venousPresLimitDelta = stagedParams[ TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT ].sInt - \
                                 stagedParams[ TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT ].sInt;
     F32 heparinVolume_mL = ( stagedParams[ TREATMENT_PARAM_HEPARIN_DISPENSE_RATE ].sFlt * \
-                           ( stagedParams[ TREATMENT_PARAM_TREATMENT_DURATION ].uInt - stagedParams[ TREATMENT_PARAM_HEPARIN_PRE_STOP_TIME ].uInt ) ) + \
+                           ( ( stagedParams[ TREATMENT_PARAM_TREATMENT_DURATION ].uInt - stagedParams[ TREATMENT_PARAM_HEPARIN_PRE_STOP_TIME ].uInt ) / MIN_PER_HOUR ) ) + \
                              stagedParams[ TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME ].sFlt + SYRINGE_PUMP_PRIME_VOLUME_ML + SYRINGE_PUMP_FILL_VOLUME_OFFSET_ML;