diff --git a/core/modules/widgets/navigator.js b/core/modules/widgets/navigator.js
index 205db4c91..d1d870cc0 100755
--- a/core/modules/widgets/navigator.js
+++ b/core/modules/widgets/navigator.js
@@ -413,6 +413,9 @@ NavigatorWidget.prototype.handleCancelTiddlerEvent = function(event) {
 // If a draft of the target tiddler already exists then it is reused
 NavigatorWidget.prototype.handleNewTiddlerEvent = function(event) {
 	event = $tw.hooks.invokeHook("th-new-tiddler", event);
+	if(!event) {
+		return false;
+	}
 	// Get the story details
 	var storyList = this.getStoryList(),
 		templateTiddler, additionalFields, title, draftTitle, existingTiddler,