diff --git a/hw/net/xilinx_ethlite.c b/hw/net/xilinx_ethlite.c
index 3252c9d508..ce9555bd1e 100644
--- a/hw/net/xilinx_ethlite.c
+++ b/hw/net/xilinx_ethlite.c
@@ -62,6 +62,7 @@
 
 typedef struct XlnxXpsEthLitePort {
     struct {
+        uint32_t tx_len;
         uint32_t tx_gie;
 
         uint32_t rx_ctrl;
@@ -133,6 +134,9 @@ eth_read(void *opaque, hwaddr addr, unsigned int size)
 
         case R_TX_LEN0:
         case R_TX_LEN1:
+            r = s->port[port_index].reg.tx_len;
+            break;
+
         case R_TX_CTRL1:
         case R_TX_CTRL0:
             r = s->regs[addr];
@@ -170,7 +174,7 @@ eth_write(void *opaque, hwaddr addr,
             if ((value & (CTRL_P | CTRL_S)) == CTRL_S) {
                 qemu_send_packet(qemu_get_queue(s->nic),
                                  txbuf_ptr(s, port_index),
-                                 s->regs[base + R_TX_LEN0]);
+                                 s->port[port_index].reg.tx_len);
                 if (s->regs[base + R_TX_CTRL0] & CTRL_I)
                     eth_pulse_irq(s);
             } else if ((value & (CTRL_P | CTRL_S)) == (CTRL_P | CTRL_S)) {
@@ -195,7 +199,7 @@ eth_write(void *opaque, hwaddr addr,
 
         case R_TX_LEN0:
         case R_TX_LEN1:
-            s->regs[addr] = value;
+            s->port[port_index].reg.tx_len = value;
             break;
 
         case R_TX_GIE0: