diff --git a/src/gui_builder.cc b/src/gui_builder.cc
index a08dabd..e8ca872 100644
--- a/src/gui_builder.cc
+++ b/src/gui_builder.cc
@@ -650,13 +650,14 @@ GuiBuilder::GuiBuilder(const std::string& gladefile)
   simulation_jump_to->signal_clicked().connect(sigc::mem_fun(*this, &GuiBuilder::on_simulation_jump_to_clicked));
   
 
+  Window& main_window = get_initial_window();
   // HoltGraph container window 
-  _holt_container.set_keep_above();
+  _holt_container.set_transient_for(main_window);
   _holt_container.get_holt_widget().set_show_threads(_show_threads);
   _holt_container.show();
   
     // Statistics container window 
-  _statistics_container.set_keep_above();  
+  _statistics_container.set_transient_for(main_window);
   _statistics_container.show();
 }
 
diff --git a/src/holt_container_window.cc b/src/holt_container_window.cc
index 9161a43..516a215 100644
--- a/src/holt_container_window.cc
+++ b/src/holt_container_window.cc
@@ -33,10 +33,12 @@ using namespace Glib;
 
 
 HoltContainerWindow::HoltContainerWindow(Simulation& simulation)
-: _holt_widget(simulation), _auto_dispose(true)
+  : Window(), _holt_widget(simulation), _auto_dispose(true)
 {
   // This just sets the title of our new window.
   set_title(_("Holt Graph"));
+  set_type_hint(Gdk::WINDOW_TYPE_HINT_UTILITY);
+
   add(_holt_widget);
   _holt_widget.set_scaling_mode(CairoWidget::scaling_min);
   _holt_widget.show();
diff --git a/src/statistics_container_window.cc b/src/statistics_container_window.cc
index 936ee3f..b68ca39 100644
--- a/src/statistics_container_window.cc
+++ b/src/statistics_container_window.cc
@@ -28,6 +28,8 @@ StatisticsContainerWindow::StatisticsContainerWindow()
 {
     // This just sets the title of our new window.
 	set_title(_("Simulation Statistics"));
+  set_type_hint(Gdk::WINDOW_TYPE_HINT_UTILITY);
+
 	_scrolled_tabular.add(_tabular_schedulables_statistics_widget);
 	add(_scrolled_tabular);
 	_scrolled_tabular.show();