Index: firmware/App/Controllers/DialOutFlow.c
===================================================================
diff -u -rf6b78d1fe6741043de38707211710ab0e8a08483 -rda838b2d59d8b12a239cd31f8b68b2b1bf78e4ae
--- firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision f6b78d1fe6741043de38707211710ab0e8a08483)
+++ firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision da838b2d59d8b12a239cd31f8b68b2b1bf78e4ae)
@@ -101,7 +101,7 @@
 #define DOP_REV_PER_LITER                       146.84          ///< Rotor revolutions per liter.
 #define DOP_ML_PER_MIN_TO_PUMP_RPM_FACTOR       ( DOP_REV_PER_LITER / ML_PER_LITER )   ///< Conversion factor from mL/min to pump motor RPM.
 #define DOP_GEAR_RATIO                          32.0            ///< Pump motor to pump gear ratio.
-#define DOP_PWM_ZERO_OFFSET                     0.1             ///< 10% PWM duty cycle = zero speed.
+#define DOP_PWM_ZERO_OFFSET                     0.1F            ///< 10% PWM duty cycle = zero speed.
 
 /// Macro converts a flow rate to an estimated PWM duty cycle %.
 #define DOP_PWM_FROM_ML_PER_MIN(rate)           ( (rate) * DOP_ML_PER_MIN_TO_PUMP_RPM_FACTOR * DOP_GEAR_RATIO * DOP_MOTOR_RPM_TO_PWM_DC_FACTOR + DOP_PWM_ZERO_OFFSET )