diff --git a/rt-thread-version/rt-thread-standard/programming-manual/atomic/atomic.md b/rt-thread-version/rt-thread-standard/programming-manual/atomic/atomic.md
index 792c44655eec5e017b163a41a4c109645af99787..9a3cfedaf90fb224db6286a26066eedc948fba17 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/atomic/atomic.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/atomic/atomic.md
@@ -241,7 +241,7 @@ rt_atomic_t value2 = 5;
 int main(void)
 {
     /* atomic add */
-    result = rt_atomic_add(&value1, value2);
+    int result = rt_atomic_add(&value1, value2);
     rt_kprintf("result = %d value1 = %d value2 = %d\r\n", result, value1, value2);
 
     value1 = 10;