diff --git a/core/boot.js b/core/boot.js
index 773c7f0ae..270129523 100644
--- a/core/boot.js
+++ b/core/boot.js
@@ -519,7 +519,7 @@ Construct a wiki store object
 $tw.Wiki = function() {
 	this.tiddlers = {};
 	this.plugins = {}; // Hashmap of plugin information by title
-	this.pluginTiddlers = {}; // Hashmap of constituent tiddlers from plugins by title
+	this.shadowTiddlers = {}; // Hashmap of constituent tiddlers from plugins by title
 };
 
 $tw.Wiki.prototype.addTiddler = function(tiddler) {
@@ -550,9 +550,9 @@ $tw.Wiki.prototype.unpackPluginTiddlers = function() {
 				var constituentTiddler = pluginInfo.tiddlers[t],
 					constituentTitle = pluginInfo.title + "/" + t;
 				// Don't overwrite tiddlers that already exist
-				if(!$tw.utils.hop(self.pluginTiddlers,constituentTitle)) {
+				if(!$tw.utils.hop(self.shadowTiddlers,constituentTitle)) {
 					// Save the tiddler object
-					self.pluginTiddlers[constituentTitle] = new $tw.Tiddler(constituentTiddler,{title: constituentTitle});
+					self.shadowTiddlers[constituentTitle] = new $tw.Tiddler(constituentTiddler,{title: constituentTitle});
 				}
 			}
 		}
@@ -588,7 +588,7 @@ Register all the module tiddlers that have a module type
 */
 $tw.Wiki.prototype.definePluginModules = function() {
 	var self = this;
-	$tw.utils.each(this.pluginTiddlers,function(element,title,object) {
+	$tw.utils.each(this.shadowTiddlers,function(element,title,object) {
 		var tiddler = self.getTiddler(title);
 		if(!$tw.utils.hop(self.tiddlers,title)) { // Don't define the module if it is overidden by an ordinary tiddler
 			if(tiddler.fields.type === "application/javascript" && tiddler.hasField("module-type")) {
@@ -603,8 +603,8 @@ $tw.Wiki.prototype.getTiddler = function(title) {
 	var t = this.tiddlers[title];
 	if(t instanceof $tw.Tiddler) {
 		return t;
-	} else if($tw.utils.hop(this.pluginTiddlers,title)) {
-		return this.pluginTiddlers[title];
+	} else if($tw.utils.hop(this.shadowTiddlers,title)) {
+		return this.shadowTiddlers[title];
 	} else {
 		return undefined;
 	}