Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r6419179374edcd65da462de84e8aeaefb7e20320 -rfa0ab419491364c1d2a28caf216e20175181372d
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 6419179374edcd65da462de84e8aeaefb7e20320)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision fa0ab419491364c1d2a28caf216e20175181372d)
@@ -270,7 +270,7 @@
 {
     U32 fpgaArtPres = getFPGAArterialPressure();
     S32 artPres = (S32)( fpgaArtPres & MASK_OFF_U32_MSB ) - 0x800000;   // Subtract 2^23 from low 24 bits to get signed reading
-    U08 artPresAlarm = (U08)( fpgaArtPres >> 24 );                      // High byte is alarm code for arterial pressure
+    U08 artPresAlarm = (U08)( fpgaArtPres >> SHIFT_24_BITS );           // High byte is alarm code for arterial pressure
     U16 fpgaVenPres = getFPGAVenousPressure();
     U16 venPres = fpgaVenPres & 0x3FFF;                                 // 14-bit data
     U08 venPresStatus = (U08)( fpgaVenPres >> 14 );                     // High 2 bits is status code for venous pressure