Index: code/dialogs/preferences-dialog.hpp
===================================================================
--- code/dialogs/preferences-dialog.hpp (revision d9e7c10072bf70e75cfb3112a99edffe7f221aab)
+++ code/dialogs/preferences-dialog.hpp (revision 89522f27a66031ffc1904084a1ab36ceb0d09bb2)
@@ -187,4 +187,5 @@
 		Group m_group_margin;
 		Group m_group_bracket;
+		Group m_group_spaces;
 
 		Gtk::CheckButton m_btn_wrap_text;
@@ -201,4 +202,6 @@
 
 		Gtk::CheckButton m_btn_bracket_highlight;
+		PreferencesComboBox<GtkSourceDrawSpacesFlags>
+			m_cmb_spaces_display;
 	};