diff --git a/avr/comproto.asm b/avr/comproto.asm
index c47f6e8..4bc7f0f 100644
--- a/avr/comproto.asm
+++ b/avr/comproto.asm
@@ -92,6 +92,9 @@ cproHandlePing:
   breq cproHandlePing_notHandled
   inc r16
   breq cproHandlePing_notHandled      ; dont handle src address 255
+  dec r16
+  ldi xl, LOW(com2SendBuffer)
+  ldi xh, HIGH(com2SendBuffer)
   rcall CPRO_WritePong
   rjmp COM2_SendPacket                ; use carry flag from this routine
 cproHandlePing_notHandled: