diff --git a/stm32f407vet6_v2/applications/app.c b/stm32f407vet6_v2/applications/app.c
index 7f625dc..71a86cd 100644
--- a/stm32f407vet6_v2/applications/app.c
+++ b/stm32f407vet6_v2/applications/app.c
@@ -26,6 +26,6 @@ void test_timegm(void)
     tm.tm_isdst = 0;           // 不使用夏令时
 
     timestamp = mktime(&tm);
-    //rt_kprintf("时间戳: %ld\n", (long)timestamp);
+    rt_kprintf("时间戳: %ld\n", (long)timestamp);
 }
 MSH_CMD_EXPORT(test_timegm, test timegm function);
\ No newline at end of file