diff --git a/components/driver/uart.c b/components/driver/uart.c
index c4c98cef03..9b8dcb9c38 100644
--- a/components/driver/uart.c
+++ b/components/driver/uart.c
@@ -1257,7 +1257,7 @@ int uart_write_bytes_with_break(uart_port_t uart_num, const void *src, size_t si
 static bool uart_check_buf_full(uart_port_t uart_num)
 {
     if (p_uart_obj[uart_num]->rx_buffer_full_flg) {
-        BaseType_t res = xRingbufferSend(p_uart_obj[uart_num]->rx_ring_buf, p_uart_obj[uart_num]->rx_data_buf, p_uart_obj[uart_num]->rx_stash_len, 1);
+        BaseType_t res = xRingbufferSend(p_uart_obj[uart_num]->rx_ring_buf, p_uart_obj[uart_num]->rx_data_buf, p_uart_obj[uart_num]->rx_stash_len, 0);
         if (res == pdTRUE) {
             UART_ENTER_CRITICAL(&(uart_context[uart_num].spinlock));
             p_uart_obj[uart_num]->rx_buffered_len += p_uart_obj[uart_num]->rx_stash_len;
@@ -1371,7 +1371,7 @@ esp_err_t uart_flush_input(uart_port_t uart_num)
         UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
         vRingbufferReturnItem(p_uart->rx_ring_buf, data);
         if (p_uart_obj[uart_num]->rx_buffer_full_flg) {
-            BaseType_t res = xRingbufferSend(p_uart_obj[uart_num]->rx_ring_buf, p_uart_obj[uart_num]->rx_data_buf, p_uart_obj[uart_num]->rx_stash_len, 1);
+            BaseType_t res = xRingbufferSend(p_uart_obj[uart_num]->rx_ring_buf, p_uart_obj[uart_num]->rx_data_buf, p_uart_obj[uart_num]->rx_stash_len, 0);
             if (res == pdTRUE) {
                 UART_ENTER_CRITICAL(&(uart_context[uart_num].spinlock));
                 p_uart_obj[uart_num]->rx_buffered_len += p_uart_obj[uart_num]->rx_stash_len;