diff --git a/src/content/themes/default/index.php b/src/content/themes/default/index.php
index 032d9f3..976c7cc 100644
--- a/src/content/themes/default/index.php
+++ b/src/content/themes/default/index.php
@@ -29,7 +29,7 @@
 $().ready(function(){
 	mytinytodo.init({
 		token: "<?php echo htmlspecialchars(access_token()); ?>" ,
-		title: <?php echo json_encode(get_unsafe_mttinfo('title'), JSON_UNESCAPED_UNICODE); ?> ,
+		title: <?php echo mtt_quoted_title() ?> ,
 		lang: <?php echo Lang::instance()->makeJS() ?>,
 		mttUrl: "<?php mttinfo('mtt_url'); ?>",
 		homeUrl: "<?php mttinfo('url'); ?>",
diff --git a/src/init.php b/src/init.php
index a346615..83b5fdb 100644
--- a/src/init.php
+++ b/src/init.php
@@ -250,6 +250,15 @@ function reset_mttinfo($key)
 	unset( $_mttinfo[$key] );
 }
 
+function mtt_quoted_title()
+{
+	$s = json_encode(get_unsafe_mttinfo('title'), JSON_UNESCAPED_UNICODE);
+	if ($s === false) {
+		return '""';
+	}
+	return $s;
+}
+
 function getRequestUri()
 {
 	// Do not use HTTP_X_REWRITE_URL due to CVE-2018-14773