diff --git a/src/network/network.cpp b/src/network/network.cpp
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -217,7 +217,7 @@ bool NetworkCompanyIsPassworded(CompanyI
 /* This puts a text-message to the console, or in the future, the chat-box,
  *  (to keep it all a bit more general)
  * If 'self_send' is true, this is the client who is sending the message */
-void NetworkTextMessage(NetworkAction action, TextColour colour, bool self_send, const std::string &name, const std::string &str, int64 data)
+void NetworkTextMessage(NetworkAction action, TextColour colour, bool self_send, const std::string &name, const std::string &str, int64 data, const std::string &data_str)
 {
 	StringID strid;
 	switch (action) {
@@ -248,6 +248,7 @@ void NetworkTextMessage(NetworkAction ac
 		case NETWORK_ACTION_CHAT_COMPANY:   strid = self_send ? STR_NETWORK_CHAT_TO_COMPANY : STR_NETWORK_CHAT_COMPANY; break;
 		case NETWORK_ACTION_CHAT_CLIENT:    strid = self_send ? STR_NETWORK_CHAT_TO_CLIENT  : STR_NETWORK_CHAT_CLIENT;  break;
 		case NETWORK_ACTION_KICKED:         strid = STR_NETWORK_MESSAGE_KICKED; break;
+		case NETWORK_ACTION_EXTERNAL_CHAT:  strid = STR_NETWORK_CHAT_EXTERNAL; break;
 		default:                            strid = STR_NETWORK_CHAT_ALL; break;
 	}
 
@@ -255,6 +256,7 @@ void NetworkTextMessage(NetworkAction ac
 	SetDParamStr(0, name);
 	SetDParamStr(1, str);
 	SetDParam(2, data);
+	SetDParamStr(3, data_str);
 
 	/* All of these strings start with "***". These characters are interpreted as both left-to-right and
 	 * right-to-left characters depending on the context. As the next text might be an user's name, the
@@ -265,7 +267,7 @@ void NetworkTextMessage(NetworkAction ac
 
 	Debug(desync, 1, "msg: {:08x}; {:02x}; {}", _date, _date_fract, message);
 	IConsolePrint(colour, message);
-	NetworkAddChatMessage((TextColour)colour, _settings_client.gui.network_chat_timeout, message);
+	NetworkAddChatMessage(colour, _settings_client.gui.network_chat_timeout, message);
 }
 
 /* Calculate the frame-lag of a client */