Index: firmware/App/Drivers/GLXferPump.c
===================================================================
diff -u -r3833b21251d0192f016e1e07b5f0e4470c9ba8d4 -re6831fb6922ce22771e28b9c13dc2a9145c35ee6
--- firmware/App/Drivers/GLXferPump.c	(.../GLXferPump.c)	(revision 3833b21251d0192f016e1e07b5f0e4470c9ba8d4)
+++ firmware/App/Drivers/GLXferPump.c	(.../GLXferPump.c)	(revision e6831fb6922ce22771e28b9c13dc2a9145c35ee6)
@@ -102,17 +102,18 @@
 *************************************************************************/
 U16 getAirPumpMotorRPM( void )
 {
-    double  realRPM;
+    F32  realRPM;
     U16 fpgaRPM = getH12AirPumpMotorRPM();
 
     if ( 0xFFFF == fpgaRPM )
     {
-        realRPM = 0;
+        realRPM = 0.0F;
     }
     else
     {
-        realRPM = ( ( ( double )AIR_PUMP_RPM_FACTOR ) / ( double )( fpgaRPM * 1e-6 ) );
+        realRPM = ( ( ( F32 )AIR_PUMP_RPM_FACTOR ) / ( F32 )( fpgaRPM * 1e-6 ) );
     }
+
     return ( U16 )realRPM;
 }