diff --git a/httpd.c b/httpd.c
index 9df30b6..43d8510 100644
--- a/httpd.c
+++ b/httpd.c
@@ -527,7 +527,7 @@ int startup(u_short *port)
  //如果调用 bind 后端口号仍然是0，则手动调用getsockname()获取端口号
  if (*port == 0)  /* if dynamically allocating a port */
  {
-  int namelen = sizeof(name);
+  size_t namelen = sizeof(name);
   //getsockname()包含于<sys/socker.h>中，参读《TLPI》P1263
   //调用getsockname()获取系统给 httpd 这个 socket 随机分配的端口号
   if (getsockname(httpd, (struct sockaddr *)&name, &namelen) == -1)
@@ -577,7 +577,7 @@ int main(void)
  int client_sock = -1;
  //sockaddr_in 是 IPV4的套接字地址结构。定义在<netinet/in.h>,参读《TLPI》P1202
  struct sockaddr_in client_name;
- int client_name_len = sizeof(client_name);
+ size_t client_name_len = sizeof(client_name);
  //pthread_t newthread;
 
  server_sock = startup(&port);