diff --git a/chrome/skin/default/zotero/overlay.css b/chrome/skin/default/zotero/overlay.css
index 55a0f2f0b..f2ac109c7 100644
--- a/chrome/skin/default/zotero/overlay.css
+++ b/chrome/skin/default/zotero/overlay.css
@@ -59,7 +59,6 @@
 	margin-right: 5px;
 }
 
-
 /* Style search results, display non-matches in gray */
 #zotero-items-tree treechildren::-moz-tree-cell-text(contextRow) {
 	color: gray;
@@ -71,6 +70,11 @@
 	color: inherit;
 }
 
+#zotero-advanced-search-dialog #zotero-items-tree
+{
+	min-height: 250px;
+}
+
 #zotero-items-pane
 {
 	min-width: 300px;