diff --git a/avr/devices/all/sendvalue.asm b/avr/devices/all/sendvalue.asm
index 6826419..9272456 100644
--- a/avr/devices/all/sendvalue.asm
+++ b/avr/devices/all/sendvalue.asm
@@ -55,6 +55,7 @@ Main_SendValueReport_end:
 ; @param  R23     command
 ; @param  R25:R24 ref msg id
 ; @return CFLAG on success, cleared on error
+; @clobbers R16, R17, R18, R19, R20, R21, R23, R24, R25, X, Y
 
 Main_SendValueResponse:
   push r17