diff --git a/doc/esp8266wifi/server-class.rst b/doc/esp8266wifi/server-class.rst
index 8b8bc0e6c..8bcce9994 100644
--- a/doc/esp8266wifi/server-class.rst
+++ b/doc/esp8266wifi/server-class.rst
@@ -18,6 +18,11 @@ For most use cases the basic WiFiServer class of the ESP8266WiFi library is suit
 
 Methods and properties described further down are specific to ESP8266. They are not covered in `Arduino WiFi library <https://www.arduino.cc/en/Reference/WiFi>`__ documentation. Before they are fully documented please refer to information below.
 
+begin(port)
+~~~~~~~~~~~
+
+Additionally to ``begin()`` without parameter and a constructor with parameter ``port``, ESP8266WiFi library has ``begin(uint16_t port)`` and a constructor without parameters. If port is not specified with constructor and ``begin`` without parameter is used, the server is started on port 23.
+
 accept
 ~~~~~~
 
diff --git a/libraries/ESP8266WiFi/src/ArduinoWiFiServer.h b/libraries/ESP8266WiFi/src/ArduinoWiFiServer.h
index 21dec5f62..45e5e59d6 100644
--- a/libraries/ESP8266WiFi/src/ArduinoWiFiServer.h
+++ b/libraries/ESP8266WiFi/src/ArduinoWiFiServer.h
@@ -32,7 +32,7 @@ class ArduinoCompatibleWiFiServerTemplate : public TServer, public Print {
 public:
 
   ArduinoCompatibleWiFiServerTemplate(const IPAddress& addr, uint16_t port) : TServer(addr, port) {}
-  ArduinoCompatibleWiFiServerTemplate(uint16_t port) : TServer(port) {}
+  ArduinoCompatibleWiFiServerTemplate(uint16_t port = 23) : TServer(port) {}
   virtual ~ArduinoCompatibleWiFiServerTemplate() {}
 
   // https://www.arduino.cc/en/Reference/WiFiServerAvailable
diff --git a/libraries/ESP8266WiFi/src/WiFiServer.h b/libraries/ESP8266WiFi/src/WiFiServer.h
index 049aa9f9d..b0f51b02f 100644
--- a/libraries/ESP8266WiFi/src/WiFiServer.h
+++ b/libraries/ESP8266WiFi/src/WiFiServer.h
@@ -79,7 +79,7 @@ protected:
 
 public:
   WiFiServer(const IPAddress& addr, uint16_t port);
-  WiFiServer(uint16_t port);
+  WiFiServer(uint16_t port = 23);
   virtual ~WiFiServer() {}
   WiFiClient accept(); // https://www.arduino.cc/en/Reference/EthernetServerAccept
   WiFiClient available(uint8_t* status = NULL) __attribute__((deprecated("Renamed to accept().")));