diff --git a/src/intro_gui.cpp b/src/intro_gui.cpp
index 1fea69ea5b..7b02448f95 100644
--- a/src/intro_gui.cpp
+++ b/src/intro_gui.cpp
@@ -285,19 +285,6 @@ static void AskExitGameCallback(Window *w, bool confirmed)
 
 void AskExitGame()
 {
-#if defined(_WIN32)
-		SetDParam(0, STR_OSNAME_WINDOWS);
-#elif defined(__APPLE__)
-		SetDParam(0, STR_OSNAME_OSX);
-#elif defined(__HAIKU__)
-		SetDParam(0, STR_OSNAME_HAIKU);
-#elif defined(__OS2__)
-		SetDParam(0, STR_OSNAME_OS2);
-#elif defined(SUNOS)
-		SetDParam(0, STR_OSNAME_SUNOS);
-#else
-		SetDParam(0, STR_OSNAME_UNIX);
-#endif
 	ShowQuery(
 		STR_QUIT_CAPTION,
 		STR_QUIT_ARE_YOU_SURE_YOU_WANT_TO_EXIT_OPENTTD,
diff --git a/src/lang/english.txt b/src/lang/english.txt
index c055f54a05..510e29279b 100644
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -1807,18 +1807,10 @@ STR_INTRO_TRANSLATION                                           :{BLACK}This tra
 
 # Quit window
 STR_QUIT_CAPTION                                                :{WHITE}Exit
-STR_QUIT_ARE_YOU_SURE_YOU_WANT_TO_EXIT_OPENTTD                  :{YELLOW}Are you sure you want to exit OpenTTD and return to {STRING}?
+STR_QUIT_ARE_YOU_SURE_YOU_WANT_TO_EXIT_OPENTTD                  :{YELLOW}Are you sure you want to exit OpenTTD?
 STR_QUIT_YES                                                    :{BLACK}Yes
 STR_QUIT_NO                                                     :{BLACK}No
 
-# Supported OSes
-STR_OSNAME_WINDOWS                                              :Windows
-STR_OSNAME_UNIX                                                 :Unix
-STR_OSNAME_OSX                                                  :OS{NBSP}X
-STR_OSNAME_HAIKU                                                :Haiku
-STR_OSNAME_OS2                                                  :OS/2
-STR_OSNAME_SUNOS                                                :SunOS
-
 # Abandon game
 STR_ABANDON_GAME_CAPTION                                        :{WHITE}Abandon Game
 STR_ABANDON_GAME_QUERY                                          :{YELLOW}Are you sure you want to abandon this game?