diff --git a/module/doc/css/common.css b/module/doc/css/common.css
index be1403143b..eeb423498b 100644
--- a/module/doc/css/common.css
+++ b/module/doc/css/common.css
@@ -79,6 +79,8 @@ td.c-name a:visited{color: #082999}
 #queryBox #groupAndOr {min-width: 65px;}
 #noticeAcl{margin-left:10px;}
 
+#pageNav .dropdown-menu{max-height:350px; overflow-y:auto;}
+
 #createDropdown ul.dropdown-menu{width:100%;}
 
 .color-darkblue{background:rgb(0,0,139)}