diff --git a/README.md b/README.md
index 8e4f1f5..b83d482 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,8 @@ RT-Thread online packages
                Version (latest)  --->
 ```
 
+**Enable debug log output**：开启调试日志显示，可以用于查看请求和响应的头部数据信息；
+
 **Enable webclient GET/POST samples** ：添加示例代码；
 
 **Select TLS mode** ：配置开启 HTTPS 支持，选择支持的模式；
diff --git a/src/webclient.c b/src/webclient.c
index 4d222d0..55de69a 100644
--- a/src/webclient.c
+++ b/src/webclient.c
@@ -1095,6 +1095,7 @@ static int webclient_next_chunk(struct webclient_session *session)
 
     RT_ASSERT(session);
 
+    rt_memset(line, 0x00, sizeof(line));
     length = webclient_read_line(session, line, sizeof(line));
     if (length > 0)
     {