Index: firmware/App/Controllers/BloodFlow.c
===================================================================
diff -u -r5545719a6bde1e93991c25918d975024b44c1b43 -r056ef172979282cacadfe7a58842821ea431cc50
--- firmware/App/Controllers/BloodFlow.c	(.../BloodFlow.c)	(revision 5545719a6bde1e93991c25918d975024b44c1b43)
+++ firmware/App/Controllers/BloodFlow.c	(.../BloodFlow.c)	(revision 056ef172979282cacadfe7a58842821ea431cc50)
@@ -59,7 +59,7 @@
 /// Interval (ms/task time) at which the blood pump speed is calculated (every 40 ms).
 #define BP_SPEED_CALC_INTERVAL              ( 40 / TASK_PRIORITY_INTERVAL )
 /// Number of hall sensor counts kept in buffer to hold last 1 second of count data.
-#define BP_SPEED_CALC_BUFFER_LEN            ( 1000 / BP_SPEED_CALC_INTERVAL / TASK_PRIORITY_INTERVAL )
+#define BP_SPEED_CALC_BUFFER_LEN            ( MS_PER_SECOND / BP_SPEED_CALC_INTERVAL / TASK_PRIORITY_INTERVAL )
 #define BP_MAX_ROTOR_SPEED_RPM              100.0           ///< Maximum rotor speed allowed for blood pump.
 
 #define BP_MAX_FLOW_VS_SPEED_DIFF_RPM       200.0           ///< Maximum difference between measured speed and speed implied by measured flow.