diff --git a/gtk3/main.c b/gtk3/main.c
index 766052f..4be2ff3 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -360,6 +360,7 @@ static void rumble_callback(GB_gameboy_t *gb, double amp) {
 // because the UI definition can’t define string arguments for signal handlers.
 static void create_model_menu_items() {
 	bool on_change_model(GtkWidget *, gpointer);
+	bool on_change_linked_device(GtkWidget *, gpointer);
 
 	static const char *const model_names[] = {
 		"Game Boy",
@@ -402,7 +403,7 @@ static void create_model_menu_items() {
 
 	CheckMenuItemGroup *link_group = check_menu_item_group_new((char **) peripheral_names, (char **) peripheral_codes);
 	check_menu_item_group_insert_into_menu_shell(link_group, GTK_MENU_SHELL(builder_get(GTK_MENU_SHELL, "link_menu")), 0);
-	// check_menu_item_group_connect_toggle_signal(link_group, on_change_linked_device);
+	check_menu_item_group_connect_toggle_signal(link_group, on_change_linked_device);
 	check_menu_item_group_activate(link_group, "NONE");
 }
 
@@ -1083,6 +1084,21 @@ G_MODULE_EXPORT void on_quit_activate(GtkWidget *w, gpointer user_data_ptr) {
 	quit();
 }
 
+bool on_change_linked_device(GtkWidget *widget, gpointer user_data) {
+	GtkCheckMenuItem *check_menu_item = GTK_CHECK_MENU_ITEM(widget);
+
+	if (!gtk_check_menu_item_get_active(check_menu_item)) {
+		return true;
+	}
+	else if (!GB_is_inited(&gb)) {
+		return false;
+	}
+
+	g_message("Not yet implemented");
+
+	return false;
+}
+
 bool on_change_model(GtkWidget *widget, gpointer user_data) {
 	GtkCheckMenuItem *check_menu_item = GTK_CHECK_MENU_ITEM(widget);
 	gchar *model_str = (gchar *) user_data;
diff --git a/gtk3/resources/ui/window.ui b/gtk3/resources/ui/window.ui
index 63fe238..199256d 100644
--- a/gtk3/resources/ui/window.ui
+++ b/gtk3/resources/ui/window.ui
@@ -308,7 +308,7 @@ Maximilian Mader https://github.com/max-m</property>
               </object>
             </child>
             <child>
-              <object class="GtkMenuItem">
+              <object class="GtkCheckMenuItem">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="action_name">app.pause</property>
@@ -390,7 +390,7 @@ Maximilian Mader https://github.com/max-m</property>
             <property name="visible">True</property>
             <property name="can_focus">False</property>
             <child>
-              <object class="GtkMenuItem">
+              <object class="GtkCheckMenuItem">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="action_name">app.toggle_developer_mode</property>