diff --git a/app/ui/settings_dialog.glade b/app/ui/settings_dialog.glade
index 2f5cfaf2..9eb2fa21 100644
--- a/app/ui/settings_dialog.glade
+++ b/app/ui/settings_dialog.glade
@@ -972,6 +972,8 @@ Author: Dmitriy Yefremov
                                             <property name="visible">True</property>
                                             <property name="can_focus">True</property>
                                             <property name="hexpand">True</property>
+                                            <property name="visibility">False</property>
+                                            <property name="invisible_char">●</property>
                                             <property name="width_chars">12</property>
                                             <property name="max_width_chars">15</property>
                                             <property name="primary_icon_name">emblem-readonly</property>