diff --git a/js/ui/closeDialog.js b/js/ui/closeDialog.js
index 86d14059a..8353b56cb 100644
--- a/js/ui/closeDialog.js
+++ b/js/ui/closeDialog.js
@@ -67,7 +67,7 @@ var CloseDialog = GObject.registerClass({
         this._dialog.width = windowActor.width;
         this._dialog.height = windowActor.height;
 
-        this._dialog.addContent(this._createDialogContent());
+        this._dialog.contentLayout.add_child(this._createDialogContent());
         this._dialog.addButton({ label: _('Force Quit'),
                                  action: this._onClose.bind(this),
                                  default: true });
diff --git a/js/ui/dialog.js b/js/ui/dialog.js
index c2d2e04b6..0799ad27f 100644
--- a/js/ui/dialog.js
+++ b/js/ui/dialog.js
@@ -99,10 +99,6 @@ class Dialog extends St.Widget {
         return this._initialKeyFocus || this;
     }
 
-    addContent(actor) {
-        this.contentLayout.add(actor, { expand: true });
-    }
-
     addButton(buttonInfo) {
         let { label, action, key } = buttonInfo;
         let isDefault = buttonInfo['default'];