diff --git a/IPython/html/static/notebook/less/outputarea.less b/IPython/html/static/notebook/less/outputarea.less
index 9d485ff..c040cd6 100644
--- a/IPython/html/static/notebook/less/outputarea.less
+++ b/IPython/html/static/notebook/less/outputarea.less
@@ -14,6 +14,7 @@ div.output_scroll {
     overflow: auto;
     .corner-all;
     .box-shadow(inset 0 2px 8px rgba(0, 0, 0, .8));
+    display: block;
 }
 
 /* output div while it is collapsed */