diff --git a/src/ui/widget/preferences-widget.cpp b/src/ui/widget/preferences-widget.cpp
index 16c73f91cfa8e2a68c401ad860c378081fa6b476..11748d932101cf08f879768ac08b85e3cc3a8550 100644
--- a/src/ui/widget/preferences-widget.cpp
+++ b/src/ui/widget/preferences-widget.cpp
@@ -220,11 +220,17 @@ PrefRadioButtons::PrefRadioButtons(const std::vector<PrefItem>& buttons, const G
         auto* btn = Gtk::make_managed<PrefRadioButton>();
         btn->init(item.label, prefs_path, item.int_value, item.is_default, group);
         btn->set_tooltip_text(item.tooltip);
+        btn->changed_signal.connect([=, this](bool active) { if (active) PrefRadioButtons::on_changed(item.int_value); });
         append(*btn);
         if (!group) group = btn;
     }
 }
 
+void PrefRadioButtons::on_changed(int value)
+{
+    changed_signal.emit(value);
+}
+
 void PrefSpinButton::init(Glib::ustring const &prefs_path,
               double lower, double upper, double step_increment, double /*page_increment*/,
               double default_value, bool is_int, bool is_percent)
diff --git a/src/ui/widget/preferences-widget.h b/src/ui/widget/preferences-widget.h
index 443beac31b2c19b22146ef6afb10bdaf4891d8c5..7ad34691e6efd308d0904db77bb1e17d7f26ca50 100644
--- a/src/ui/widget/preferences-widget.h
+++ b/src/ui/widget/preferences-widget.h
@@ -81,6 +81,10 @@ struct PrefItem { Glib::ustring label; int int_value; Glib::ustring tooltip; boo
 class PrefRadioButtons : public Gtk::Box {
 public:
     PrefRadioButtons(const std::vector<PrefItem>& buttons, const Glib::ustring& prefs_path);
+    sigc::signal<void (int)> changed_signal;
+
+private:
+    void on_changed(int value);
 };
 
 class PrefSpinButton : public SpinButton