diff --git a/src/InternalUtils.vala b/src/InternalUtils.vala
index 04f8125f..cad94dcb 100644
--- a/src/InternalUtils.vala
+++ b/src/InternalUtils.vala
@@ -147,7 +147,7 @@ namespace Gala
 
 			new_window.change_workspace_by_index (index, false);
 
-			unowned List<WindowActor> actors = Compositor.get_window_actors (new_window.get_screen ());
+			unowned List<unowned WindowActor> actors = Compositor.get_window_actors (new_window.get_screen ());
 			foreach (unowned Meta.WindowActor actor in actors) {
 				if (actor.is_destroyed ())
 					continue;
@@ -242,7 +242,7 @@ namespace Gala
 			// Assign each window to the closest available slot
 			var tmplist = windows.copy ();
 			while (tmplist.length () > 0) {
-				unowned List<TilableWindow?> link = tmplist.nth (0);
+				unowned List<unowned TilableWindow?> link = tmplist.nth (0);
 				var window = link.data;
 				var rect = window.rect;
 
diff --git a/src/Widgets/WindowCloneContainer.vala b/src/Widgets/WindowCloneContainer.vala
index bfa32b15..de0cfb74 100644
--- a/src/Widgets/WindowCloneContainer.vala
+++ b/src/Widgets/WindowCloneContainer.vala
@@ -63,7 +63,7 @@ namespace Gala
 			unowned Meta.Display display = window.get_display ();
 			var children = get_children ();
 			
-			GLib.SList<unowned Meta.Window> windows = new GLib.SList<unowned Meta.Window> ();
+			GLib.SList<Meta.Window> windows = new GLib.SList<Meta.Window> ();
 			foreach (unowned Actor child in children) {
 				unowned WindowClone tw = (WindowClone) child;
 				windows.prepend (tw.window);
@@ -149,7 +149,7 @@ namespace Gala
 			unowned Meta.Display display = screen.get_display ();
 			var children = get_children ();
 
-			GLib.SList<unowned Meta.Window> windows = new GLib.SList<unowned Meta.Window> ();
+			GLib.SList<Meta.Window> windows = new GLib.SList<Meta.Window> ();
 			foreach (unowned Actor child in children) {
 				unowned WindowClone tw = (WindowClone) child;
 				windows.prepend (tw.window);
diff --git a/src/Widgets/WindowSwitcher.vala b/src/Widgets/WindowSwitcher.vala
index f97ae56c..f3d35cfb 100644
--- a/src/Widgets/WindowSwitcher.vala
+++ b/src/Widgets/WindowSwitcher.vala
@@ -31,7 +31,7 @@ namespace Gala
 		WindowIcon? current_window = null;
 
 		Actor window_clones;
-		List<Actor> clone_sort_order;
+		List<unowned Actor> clone_sort_order;
 
 		WindowActor? dock_window;
 		Actor dock;