diff --git a/www/ebooks/author.php b/www/ebooks/author.php
index 02dd7cd4..fe9a21ea 100644
--- a/www/ebooks/author.php
+++ b/www/ebooks/author.php
@@ -3,6 +3,7 @@ require_once('Core.php');
 
 $ebooks = [];
 $author = '';
+$authorUrl = '';
 
 try{
 	$urlPath = trim(str_replace('.', '', HttpInput::Str(GET, 'url-path', true) ?? ''), '/'); // Contains the portion of the URL (without query string) that comes after https://standardebooks.org/ebooks/
diff --git a/www/ebooks/index.php b/www/ebooks/index.php
index a107a16b..0bc96be0 100644
--- a/www/ebooks/index.php
+++ b/www/ebooks/index.php
@@ -20,6 +20,8 @@ try{
 	$queryString = '';
 	$feedUrl = null;
 	$feedTitle  = '';
+	$collectionName = '';
+	$collectionType = '';
 
 	if($page <= 0){
 		$page = 1;
diff --git a/www/feeds/get.php b/www/feeds/get.php
index 2cf0151f..4c9304f8 100644
--- a/www/feeds/get.php
+++ b/www/feeds/get.php
@@ -6,6 +6,8 @@ $collection = HttpInput::Str(GET, 'collection', false);
 $name = null;
 $target = null;
 $feedTypes = ['opds', 'atom', 'rss'];
+$feedTitle = '';
+$feedUrl = '';
 $title = '';
 $description = '';
 $label = null;