Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -reae0635792a827b7cf9197cf6f6e253f2a094260 -r0b121a7c92a8d86f8369b7094b0bce21389f3747
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision eae0635792a827b7cf9197cf6f6e253f2a094260)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 0b121a7c92a8d86f8369b7094b0bce21389f3747)
@@ -1039,13 +1039,13 @@
         // If pump is running, stop it w/ park option
         if ( TRUE == concentratePumps[ pumpId ].hasTurnOnPumpsBeenRequested )
         {
-            requestConcentratePumpOff( pumpId, TRUE );
+            requestConcentratePumpOff( (CONCENTRATE_PUMPS_T)pumpId, TRUE );
         }
         // If pump is already stopped, just send park command
         else
         {
             concentratePumps[ pumpId ].hasParkBeenRequested = TRUE;
-            stopConcentratePump( pumpId );
+            stopConcentratePump( (CONCENTRATE_PUMPS_T)pumpId );
         }
     }