diff --git a/examples/system/light_sleep/main/uart_wakeup.c b/examples/system/light_sleep/main/uart_wakeup.c
index 31f41f912c..fc882ad2c2 100644
--- a/examples/system/light_sleep/main/uart_wakeup.c
+++ b/examples/system/light_sleep/main/uart_wakeup.c
@@ -107,6 +107,10 @@ static esp_err_t uart_initialization(void)
     //Install UART driver, and get the queue.
     ESP_RETURN_ON_ERROR(uart_driver_install(EXAMPLE_UART_NUM, EXAMPLE_UART_BUF_SIZE, EXAMPLE_UART_BUF_SIZE, 20, &uart_evt_que, 0),
                         TAG, "Install uart failed");
+    if (EXAMPLE_UART_NUM == CONFIG_ESP_CONSOLE_UART_NUM) {
+        /* temp fix for uart garbled output, can be removed when IDF-5683 done */
+        ESP_RETURN_ON_ERROR(uart_wait_tx_idle_polling(EXAMPLE_UART_NUM), TAG, "Wait uart tx done failed");
+    }
     ESP_RETURN_ON_ERROR(uart_param_config(EXAMPLE_UART_NUM, &uart_cfg), TAG, "Configure uart param failed");
     ESP_RETURN_ON_ERROR(uart_set_pin(EXAMPLE_UART_NUM, EXAMPLE_UART_TX_IO_NUM, EXAMPLE_UART_RX_IO_NUM, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE),
                         TAG, "Configure uart gpio pins failed");