diff --git a/rt-thread-version/rt-thread-standard/programming-manual/ipc2/ipc2.md b/rt-thread-version/rt-thread-standard/programming-manual/ipc2/ipc2.md
index 48d223430878b41fa14d31c74d7cba1e9732f5ff..79a843cb7bebc30e28b13798816457b22ed9554e 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/ipc2/ipc2.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/ipc2/ipc2.md
@@ -617,7 +617,7 @@ static void thread1_entry(void *parameter)
     while (1)
     {
         /* 从消息队列中接收消息 */
-        if (rt_mq_recv(&mq, &buf, sizeof(buf), RT_WAITING_FOREVER) > 0)
+        if (rt_mq_recv(&mq, &buf, sizeof(buf), RT_WAITING_FOREVER) == RT_EOK)
         {
             rt_kprintf("thread1: recv msg from msg queue, the content:%c\n", buf);
             if (cnt == 19)