diff --git a/src/table/settings/gui_settings.ini b/src/table/settings/gui_settings.ini
--- a/src/table/settings/gui_settings.ini
+++ b/src/table/settings/gui_settings.ini
@@ -28,6 +28,7 @@ static const SettingVariant _gui_setting
 SDTC_BOOL  =  SDTC_BOOL(              $var,        $flags, $def,                              $str, $strhelp, $strval, $pre_cb, $post_cb, $str_cb, $help_cb, $val_cb, $from, $to,        $cat, $extra, $startup),
 SDTC_OMANY = SDTC_OMANY(              $var, $type, $flags, $def,             $max, $full,     $str, $strhelp, $strval, $pre_cb, $post_cb, $str_cb, $help_cb, $val_cb, $from, $to,        $cat, $extra, $startup),
 SDTC_VAR   =   SDTC_VAR(              $var, $type, $flags, $def,       $min, $max, $interval, $str, $strhelp, $strval, $pre_cb, $post_cb, $str_cb, $help_cb, $val_cb, $from, $to,        $cat, $extra, $startup),
+SDTC_SSTR  =  SDTC_SSTR(              $var, $type, $flags, $def,             0,                                        $pre_cb, $post_cb,                             $from, $to,        $cat, $extra, $startup),
 
 [validation]
 SDTC_OMANY = static_assert($max <= MAX_$type, "Maximum value for $var exceeds storage size");
@@ -903,3 +904,9 @@ post_cb  = [](auto) { SetupWidgetDimensi
 cat      = SC_BASIC
 startup  = true
 
+[SDTC_SSTR]
+var      = gui.digit_decimal_separator
+flags    = SF_NOT_IN_SAVE | SF_NO_NETWORK_SYNC
+type     = SLE_STRQ
+def      = nullptr
+post_cb  = [](auto) { MarkWholeScreenDirty(); }