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 */