Index: firmware/App/Services/SystemCommMessages.h
===================================================================
diff -u -rc672f41061bcd500d6593655641cb27ce3ae58fc -r85ab84d9a0668e1e3976b00eb29e79c38c81b651
--- firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision c672f41061bcd500d6593655641cb27ce3ae58fc)
+++ firmware/App/Services/SystemCommMessages.h	(.../SystemCommMessages.h)	(revision 85ab84d9a0668e1e3976b00eb29e79c38c81b651)
@@ -163,7 +163,7 @@
 BOOL sendDGFillCommand( U32 fillToVolumeMl );
 
 // MSG_ID_DG_DRAIN_CMD
-BOOL sendDGDrainCommand( U32 drainToVolumeMl );
+BOOL sendDGDrainCommand( DRAIN_RESERVOIR_CMD_PAYLOAD_T *payload );
 
 // MSG_ID_STARTING_STOPPING_TREATMENT_CMD
 BOOL sendDGStartStopCommand( BOOL start );