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-rw-r--r--documentation/device/uart/uart.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/documentation/device/uart/uart.md b/documentation/device/uart/uart.md
index d49a005019..92ca9b4bf8 100644
--- a/documentation/device/uart/uart.md
+++ b/documentation/device/uart/uart.md
@@ -575,7 +575,7 @@ static void serial_thread_entry(void *parameter)
rt_memset(&msg, 0, sizeof(msg));
/* Read messages from the message queue*/
result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
- if (result == RT_EOK)
+ if (result >= 0)
{
/*Read data from the serial port*/
rx_length = rt_device_read(msg.dev, 0, rx_buffer, msg.size);