diff --git a/core/modules/storyviews/zoomin.js b/core/modules/storyviews/zoomin.js
index e37773838..b2796e953 100644
--- a/core/modules/storyviews/zoomin.js
+++ b/core/modules/storyviews/zoomin.js
@@ -35,6 +35,7 @@ var ZoominListView = function(listWidget) {
 		} else {
 			self.currentTiddlerDomNode = domNode;
 		}
+		$tw.utils.addClass(domNode,"tc-storyview-zoomin-tiddler");
 	});
 };
 
@@ -51,6 +52,7 @@ ZoominListView.prototype.navigateTo = function(historyInfo) {
 		return;
 	}
 	// Make the new tiddler be position absolute and visible so that we can measure it
+	$tw.utils.addClass(targetElement,"tc-storyview-zoomin-tiddler");
 	$tw.utils.setStyle(targetElement,[
 		{display: "block"},
 		{transformOrigin: "0 0"},
@@ -132,6 +134,7 @@ ZoominListView.prototype.insert = function(widget) {
 		return;
 	}
 	// Make the newly inserted node position absolute and hidden
+	$tw.utils.addClass(targetElement,"tc-storyview-zoomin-tiddler");
 	$tw.utils.setStyle(targetElement,[
 		{display: "none"}
 	]);
@@ -154,6 +157,7 @@ ZoominListView.prototype.remove = function(widget) {
 		return;
 	}
 	// Set up the tiddler that is being closed
+	$tw.utils.addClass(targetElement,"tc-storyview-zoomin-tiddler");
 	$tw.utils.setStyle(targetElement,[
 		{display: "block"},
 		{transformOrigin: "50% 50%"},
@@ -169,6 +173,7 @@ ZoominListView.prototype.remove = function(widget) {
 	var toWidgetDomNode = toWidget && toWidget.findFirstDomNode();
 	// Set up the tiddler we're moving back in
 	if(toWidgetDomNode) {
+		$tw.utils.addClass(toWidgetDomNode,"tc-storyview-zoomin-tiddler");
 		$tw.utils.setStyle(toWidgetDomNode,[
 			{display: "block"},
 			{transformOrigin: "50% 50%"},