diff --git a/core/modules/outside_in/js/offcanvas.js b/core/modules/outside_in/js/offcanvas.js
index 7422274..ffcb5e8 100644
--- a/core/modules/outside_in/js/offcanvas.js
+++ b/core/modules/outside_in/js/offcanvas.js
@@ -122,7 +122,7 @@
         settings.dialogClass = 'ui-dialog-offcanvas';
         // Applies initial height to dialog based on window height.
         // See http://api.jqueryui.com/dialog for all dialog options.
-        settings.dialogOptions.height = $(this).height();
+        settings.height = $(window).height();
       }
     },
     'dialog:beforeclose': function (event, dialog, $element) {