diff --git a/avr/devices/all/handlevaluemsg.asm b/avr/devices/all/handlevaluemsg.asm
index 1a56f9b..7b36b9e 100644
--- a/avr/devices/all/handlevaluemsg.asm
+++ b/avr/devices/all/handlevaluemsg.asm
@@ -75,7 +75,11 @@ Main_HandleValueMsg_sendAck:
   push r23
     bigcall NETMSG_ValueRead
   pop r23
-  bigcall Main_SendValueResponse        ; (R16, R17, R18, R19, R20, R21, R23, R24, R25, X, Y)
+  push xl
+    push xh
+      bigcall Main_SendValueResponse        ; (R16, R17, R18, R19, R20, R21, R23, R24, R25, X, Y)
+    pop xh
+  pop xl
   sec
 Main_HandleValueMsg_ret:
   ret