diff --git a/IPython/frontend/html/notebook/static/js/outputarea.js b/IPython/frontend/html/notebook/static/js/outputarea.js
index 469e9a1..281ca2e 100644
--- a/IPython/frontend/html/notebook/static/js/outputarea.js
+++ b/IPython/frontend/html/notebook/static/js/outputarea.js
@@ -240,7 +240,7 @@ var IPython = (function (IPython) {
 
 
     OutputArea.prototype.create_output_area = function () {
-        var oa = $("<div/>").addClass("hbox output_area");
+        var oa = $("<div/>").addClass("output_area");
         if (this.prompt_area) {
             oa.append($('<div/>').addClass('prompt'));
         }
diff --git a/IPython/frontend/html/notebook/static/less/notebook.less b/IPython/frontend/html/notebook/static/less/notebook.less
index 08e941a..c04e7c6 100644
--- a/IPython/frontend/html/notebook/static/less/notebook.less
+++ b/IPython/frontend/html/notebook/static/less/notebook.less
@@ -273,6 +273,7 @@ div.output_prompt {
 div.output_area {
     padding: 0px;
     page-break-inside: avoid;
+    .hbox();
 }