diff --git a/core/js/Utilities.js b/core/js/Utilities.js
index 6b886a0..a34f34d 100644
--- a/core/js/Utilities.js
+++ b/core/js/Utilities.js
@@ -178,6 +178,7 @@ function onClickTag(ev)
 {
 	var e = ev || window.event;
 	var popup = Popup.create(this);
+	addClass(popup,"tag");
 	var tag = this.getAttribute("tag");
 	var title = this.getAttribute("tiddler");
 	if(popup && tag) {