Index: firmware/App/Controllers/BloodFlow.c
===================================================================
diff -u -r2254b04e7e2dd959b2778e063eb6e6fedf09781f -ra798e1b2caa26c152f2ea40b1d2d61a7da3f608d
--- firmware/App/Controllers/BloodFlow.c	(.../BloodFlow.c)	(revision 2254b04e7e2dd959b2778e063eb6e6fedf09781f)
+++ firmware/App/Controllers/BloodFlow.c	(.../BloodFlow.c)	(revision a798e1b2caa26c152f2ea40b1d2d61a7da3f608d)
@@ -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.