diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index fae43dcc1..50f4f106d 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -439,4 +439,10 @@ void rt_hw_serial_dma_tx_isr(struct rt_serial_device *serial)
     {
         serial->dma_flag = RT_FALSE;
     }
+
+    /* invoke callback */
+    if (serial->parent.tx_complete != RT_NULL)
+    {
+        serial->parent.tx_complete(&serial->parent, RT_NULL);
+    }
 }