diff --git a/README.md b/README.md
index e17d8ce..a8d6f98 100644
--- a/README.md
+++ b/README.md
@@ -254,4 +254,4 @@ CPP11实现
 ------------
 Linux高性能服务器编程，游双著.
 
-感谢以下朋友的PR和帮助: [@RownH](https://github.com/RownH)，[@mapleFU](https://github.com/mapleFU)，[@ZWiley](https://github.com/ZWiley)，[@zjuHong](https://github.com/zjuHong)，[@mamil](https://github.com/mamil)，[@byfate](https://github.com/byfate)，[@MaJun827](https://github.com/MaJun827)，[@BBLiu-coder](https://github.com/BBLiu-coder)，[@smoky96](https://github.com/smoky96)，[@yfBong](https://github.com/yfBong)，[@liuwuyao](https://github.com/liuwuyao)，[@Huixxi](https://github.com/Huixxi)，[@markparticle](https://github.com/markparticle).
+感谢以下朋友的PR和帮助: [@RownH](https://github.com/RownH)，[@mapleFU](https://github.com/mapleFU)，[@ZWiley](https://github.com/ZWiley)，[@zjuHong](https://github.com/zjuHong)，[@mamil](https://github.com/mamil)，[@byfate](https://github.com/byfate)，[@MaJun827](https://github.com/MaJun827)，[@BBLiu-coder](https://github.com/BBLiu-coder)，[@smoky96](https://github.com/smoky96)，[@yfBong](https://github.com/yfBong)，[@liuwuyao](https://github.com/liuwuyao)，[@Huixxi](https://github.com/Huixxi)，[@markparticle](https://github.com/markparticle)，[@ning2510](https://github.com/ning2510).
diff --git a/http/http_conn.cpp b/http/http_conn.cpp
index a359ab4..c0aa93b 100644
--- a/http/http_conn.cpp
+++ b/http/http_conn.cpp
@@ -549,7 +549,7 @@ bool http_conn::write()
 
         bytes_have_send += temp;
         bytes_to_send -= temp;
-        if (bytes_have_send >= m_iv[0].iov_len)
+        if (bytes_have_send >= m_write_idx)
         {
             m_iv[0].iov_len = 0;
             m_iv[1].iov_base = m_file_address + (bytes_have_send - m_write_idx);
@@ -558,7 +558,7 @@ bool http_conn::write()
         else
         {
             m_iv[0].iov_base = m_write_buf + bytes_have_send;
-            m_iv[0].iov_len = m_iv[0].iov_len - bytes_have_send;
+            m_iv[0].iov_len = m_write_idx - bytes_have_send;
         }
 
         if (bytes_to_send <= 0)