diff --git a/examples/system/network_tests/main/stdinout.c b/examples/system/network_tests/main/stdinout.c
index 75b7bba9a8..e63062dc15 100644
--- a/examples/system/network_tests/main/stdinout.c
+++ b/examples/system/network_tests/main/stdinout.c
@@ -22,6 +22,7 @@
 // Internal functions declaration referenced in io object
 //
 static esp_err_t netsuite_io_transmit(void *h, void *buffer, size_t len);
+static esp_err_t netsuite_io_transmit_wrap(void *h, void *buffer, size_t len, void *netstack_buf);
 static esp_err_t netsuite_io_attach(esp_netif_t * esp_netif, void * args);
 
 /**
@@ -31,6 +32,7 @@ static esp_err_t netsuite_io_attach(esp_netif_t * esp_netif, void * args);
 const esp_netif_driver_ifconfig_t c_driver_ifconfig = {
         .driver_free_rx_buffer = NULL,
         .transmit = netsuite_io_transmit,
+        .transmit_wrap = netsuite_io_transmit_wrap,
         .handle = "netsuite-io-object" // this IO object is a singleton, its handle uses as a name
 };
 
@@ -64,6 +66,19 @@ static esp_err_t netsuite_io_transmit(void *h, void *buffer, size_t len)
     return ESP_OK;
 }
 
+/**
+ * @brief Transmit wrapper that is typically used for buffer handling and optimization.
+ * Here just wraps the netsuite_io_transmit().
+ *
+ * @note The netstack_buf could be a ref-counted network stack buffer and might be used
+ * by the lower layers directly if an additional handling is practical.
+ * See docs on `esp_wifi_internal_tx_by_ref()` in components/esp_wifi/include/esp_private/wifi.h
+ */
+static esp_err_t netsuite_io_transmit_wrap(void *h, void *buffer, size_t len, void *netstack_buf)
+{
+    return netsuite_io_transmit(h, buffer, len);
+}
+
 /**
  * @brief Post attach adapter for netsuite i/o
  *