diff --git a/js/ui/altTab.js b/js/ui/altTab.js
index f211a8b3c..412225af6 100644
--- a/js/ui/altTab.js
+++ b/js/ui/altTab.js
@@ -512,7 +512,7 @@ SwitcherList.prototype = {
 
         let totalSpacing = this._list.spacing * (this._items.length - 1);
         alloc.min_size = this._items.length * maxChildMin + separatorWidth + totalSpacing;
-        alloc.nat_size = this._items.length * maxChildNat + separatorWidth + totalSpacing;
+        alloc.natural_size = this._items.length * maxChildNat + separatorWidth + totalSpacing;
     },
 
     _getPreferredHeight: function (actor, forWidth, alloc) {
@@ -532,7 +532,7 @@ SwitcherList.prototype = {
         }
 
         alloc.min_size = maxChildMin;
-        alloc.nat_size = maxChildNat;
+        alloc.natural_size = maxChildNat;
     },
 
     _allocate: function (actor, box, flags) {
diff --git a/js/ui/workspacesView.js b/js/ui/workspacesView.js
index a93c87b9f..c640fe195 100644
--- a/js/ui/workspacesView.js
+++ b/js/ui/workspacesView.js
@@ -747,7 +747,7 @@ SingleView.prototype = {
                 width = children[i].x + children[i].width;
             }
             alloc.min_size = width;
-            alloc.nat_size = width;
+            alloc.natural_size = width;
         }));
         this._indicatorsPanel.connect('get-preferred-height', Lang.bind(this, function (actor, fw, alloc) {
             let children = actor.get_children();
@@ -755,7 +755,7 @@ SingleView.prototype = {
             if (children.length)
                 height = children[0].height;
             alloc.min_size = height;
-            alloc.nat_size = height;
+            alloc.natural_size = height;
         }));
         this._indicatorsPanel.connect('allocate', Lang.bind(this, function (actor, box, flags) {
             let children = actor.get_children();