diff --git a/window-buttons-applet/window-buttons-applet.vala b/window-buttons-applet/window-buttons-applet.vala
index c3ed6d7..43c1e66 100644
--- a/window-buttons-applet/window-buttons-applet.vala
+++ b/window-buttons-applet/window-buttons-applet.vala
@@ -34,7 +34,7 @@ namespace WindowButtonsApplet{
 			this.set_homogeneous(true);
 
 			this.applet_style_context = applet_style_context;
-			
+
 			this.change_layout();
 			this.change_theme();
 			this.change_spacing();
@@ -179,15 +179,15 @@ namespace WindowButtonsApplet{
 			CLOSE.icon_size = size;
 			if(this.enabled_buttons.close == true)
 				CLOSE.reload();
-			
+
 			MINIMIZE.icon_size = size;
 			if(this.enabled_buttons.minimize == true)
 				MINIMIZE.reload();
-			
+
 			MAXIMIZE.icon_size = size;
 			if(this.enabled_buttons.maximize == true)
 				MAXIMIZE.reload();
-			
+
 		}
 
 		public void change_orient(int orient){
@@ -222,7 +222,7 @@ namespace WindowButtonsApplet{
 						win = null;
 				break;
 				case "topmost-maximized":
-					List<Wnck.Window*> windows = Wnck.Screen.get_default().get_windows_stacked().copy();
+					List<weak Wnck.Window> windows = Wnck.Screen.get_default().get_windows_stacked().copy();
 					windows.reverse();
 					foreach(Wnck.Window* w in windows) {
 						if(w->is_maximized() && !w->is_minimized()){
diff --git a/window-menu-applet/window-menu-applet.vala b/window-menu-applet/window-menu-applet.vala
index eb29c28..576f903 100644
--- a/window-menu-applet/window-menu-applet.vala
+++ b/window-menu-applet/window-menu-applet.vala
@@ -64,7 +64,7 @@ namespace WindowMenuApplet{
 		reload();
 
 	}
-		
+
 	private Wnck.Window get_current_window(){
 		Wnck.Window* win = null;
 		string behaviour = gsettings.get_string("behaviour");
@@ -81,7 +81,7 @@ namespace WindowMenuApplet{
 					win = null;
 			break;
 			case "topmost-maximized":
-				List<Wnck.Window*> windows = Wnck.Screen.get_default().get_windows_stacked().copy();
+				List<weak Wnck.Window> windows = Wnck.Screen.get_default().get_windows_stacked().copy();
 				windows.reverse();
 				foreach(Wnck.Window* w in windows) {
 					if(w->is_maximized() && !w->is_minimized()){
@@ -134,7 +134,7 @@ namespace WindowMenuApplet{
 
 		gsettings.bind("behaviour",builder.get_object("behaviour"),"active_id",SettingsBindFlags.DEFAULT);
 		gsettings.changed["behaviour"].connect( (key) => { reload(); } );
-		
+
 		applet.add(button);
 		applet.setup_menu(menu,action_group);
 
diff --git a/window-title-applet/window-title-applet.vala b/window-title-applet/window-title-applet.vala
index 2e991b5..36cb1a9 100644
--- a/window-title-applet/window-title-applet.vala
+++ b/window-title-applet/window-title-applet.vala
@@ -7,7 +7,7 @@ namespace WindowTitleApplet{
 	GLib.Settings gsettings;
 
 	public void reload(){
-		
+
 		// Disconnect signals from old window
 		if(window != null){
 			window->name_changed.disconnect(update);
@@ -64,7 +64,7 @@ namespace WindowTitleApplet{
 					win = null;
 			break;
 			case "topmost-maximized":
-				List<Wnck.Window*> windows = Wnck.Screen.get_default().get_windows_stacked().copy();
+				List<weak Wnck.Window> windows = Wnck.Screen.get_default().get_windows_stacked().copy();
 				windows.reverse();
 				foreach(Wnck.Window* w in windows) {
 					if(w->is_maximized() && !w->is_minimized()){
@@ -77,7 +77,7 @@ namespace WindowTitleApplet{
 
 		return win;
 	}
-		
+
 	private void clicked(Gdk.EventButton *event){
 		if(window != null){
 			window->activate(Gtk.get_current_event_time());