Index: firmware/App/Controllers/DialOutFlow.c
===================================================================
diff -u -r29a2c3c7d7618489c0ada9f98e1d30226b455392 -r98d8996eaace58d6d75b5884d6e8c0d3c2df3b17
--- firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision 29a2c3c7d7618489c0ada9f98e1d30226b455392)
+++ firmware/App/Controllers/DialOutFlow.c	(.../DialOutFlow.c)	(revision 98d8996eaace58d6d75b5884d6e8c0d3c2df3b17)
@@ -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 )