diff --git a/client_http.hpp b/client_http.hpp
index 0b2d7ef..8d5db7a 100644
--- a/client_http.hpp
+++ b/client_http.hpp
@@ -248,7 +248,7 @@ namespace SimpleWeb {
                                 if(timer)
                                     timer->cancel();
                                 if(ec) {
-                                    socket=nullptr;
+                                    this->socket=nullptr;
                                     throw boost::system::system_error(ec);
                                 }
                             });
@@ -313,7 +313,7 @@ namespace SimpleWeb {
                                 post_process();
                             }
                             else {
-                                socket=nullptr;
+                                this->socket=nullptr;
                                 throw boost::system::system_error(ec);
                             }
                         });
@@ -353,10 +353,10 @@ namespace SimpleWeb {
                                 (const boost::system::error_code &ec, boost::asio::ip::tcp::resolver::iterator /*it*/){
                             if(!ec) {
                                 boost::asio::ip::tcp::no_delay option(true);
-                                socket->set_option(option);
+                                this->socket->set_option(option);
                             }
                             else {
-                                socket=nullptr;
+                                this->socket=nullptr;
                                 throw boost::system::system_error(ec);
                             }
                         });
diff --git a/client_https.hpp b/client_https.hpp
index 02c82ac..96944cf 100644
--- a/client_https.hpp
+++ b/client_https.hpp
@@ -46,21 +46,21 @@ namespace SimpleWeb {
                                                    (const boost::system::error_code &ec, boost::asio::ip::tcp::resolver::iterator /*it*/){
                             if(!ec) {
                                 boost::asio::ip::tcp::no_delay option(true);
-                                socket->lowest_layer().set_option(option);
+                                this->socket->lowest_layer().set_option(option);
                                 
                                 auto timer=get_timeout_timer();
-                                socket->async_handshake(boost::asio::ssl::stream_base::client,
-                                                        [this, timer](const boost::system::error_code& ec) {
+                                this->socket->async_handshake(boost::asio::ssl::stream_base::client,
+                                                              [this, timer](const boost::system::error_code& ec) {
                                     if(timer)
                                         timer->cancel();
                                     if(ec) {
-                                        socket=nullptr;
+                                        this->socket=nullptr;
                                         throw boost::system::system_error(ec);
                                     }
                                 });
                             }
                             else {
-                                socket=nullptr;
+                                this->socket=nullptr;
                                 throw boost::system::system_error(ec);
                             }
                         });