diff --git a/src/table/settings/old_gameopt_settings.ini b/src/table/settings/old_gameopt_settings.ini
--- a/src/table/settings/old_gameopt_settings.ini
+++ b/src/table/settings/old_gameopt_settings.ini
@@ -14,8 +14,8 @@
 ; be saved in their new place.
 
 [pre-amble]
-static std::initializer_list<const char*> _town_names{"english", "french", "german", "american", "latin", "silly", "swedish", "dutch", "finnish", "polish", "slovak", "norwegian", "hungarian", "austrian", "romanian", "czech", "swiss", "danish", "turkish", "italian", "catalan"};
-static std::initializer_list<const char*> _climates{"temperate", "arctic", "tropic", "toyland"};
+static constexpr std::initializer_list<const char*> _town_names{"english", "french", "german", "american", "latin", "silly", "swedish", "dutch", "finnish", "polish", "slovak", "norwegian", "hungarian", "austrian", "romanian", "czech", "swiss", "danish", "turkish", "italian", "catalan"};
+static constexpr std::initializer_list<const char*> _climates{"temperate", "arctic", "tropic", "toyland"};
 
 static const SettingVariant _old_gameopt_settings_table[] = {
 /* In version 4 a new difficulty setting has been added to the difficulty settings,