diff --git a/avr/modules/uart_hw2/comonuart0.asm b/avr/modules/uart_hw2/comonuart0.asm
index 10244b4..3534567 100644
--- a/avr/modules/uart_hw2/comonuart0.asm
+++ b/avr/modules/uart_hw2/comonuart0.asm
@@ -704,6 +704,8 @@ comOnUart0SendMsg_loopComplete:
     sbrs r16, TXC0
   rjmp comOnUart0SendMsg_loopComplete
   rcall comOnUart0StopTx                     ; (R16)
+  ldi r16, NET_IFACE_OFFS_PACKETSOUT_LOW
+  rcall NET_Interface_IncCounter16           ; (R24, R25)
   rcall comOnUart0SetAttnInput               ; release ATTN (none)
   rcall Utils_WaitFor10MicroSecs             ; make sure ATTN is at least high for a short period (R22)
   sec
diff --git a/avr/modules/uart_hw2/comonuart1.asm b/avr/modules/uart_hw2/comonuart1.asm
index 5d4e985..27c51ec 100644
--- a/avr/modules/uart_hw2/comonuart1.asm
+++ b/avr/modules/uart_hw2/comonuart1.asm
@@ -704,6 +704,8 @@ comOnUart1SendMsg_loopComplete:
     sbrs r16, TXC1
   rjmp comOnUart1SendMsg_loopComplete
   rcall comOnUart1StopTx                     ; (R16)
+  ldi r16, NET_IFACE_OFFS_PACKETSOUT_LOW
+  rcall NET_Interface_IncCounter16           ; (R24, R25)
   rcall comOnUart1SetAttnInput               ; release ATTN (none)
   rcall Utils_WaitFor10MicroSecs             ; make sure ATTN is at least high for a short period (R22)
   sec