diff --git a/engines/bittorrent/merge.php b/engines/bittorrent/merge.php
index 3de1a69..18ddd67 100644
--- a/engines/bittorrent/merge.php
+++ b/engines/bittorrent/merge.php
@@ -1,5 +1,6 @@
 <?php
     class TorrentSearch extends EngineRequest {
+        protected $requests;
         public function __construct($opts, $mh) {
             parent::__construct($opts, $mh);
 
diff --git a/engines/invidious/video.php b/engines/invidious/video.php
index a5ac593..ca80b9d 100644
--- a/engines/invidious/video.php
+++ b/engines/invidious/video.php
@@ -1,5 +1,6 @@
 <?php
     class VideoSearch extends EngineRequest {
+        protected $instance_url;
         public function get_request_url() {
             $this->instance_url = $this->opts->invidious_instance_for_video_results;
             $query = urlencode($this->query);
diff --git a/engines/librex/fallback.php b/engines/librex/fallback.php
index 15b03a3..6d94cf5 100644
--- a/engines/librex/fallback.php
+++ b/engines/librex/fallback.php
@@ -1,6 +1,7 @@
 <?php
 
     class LibreXFallback extends EngineRequest {
+        protected $instance;
         public function __construct($instance, $opts, $mh) {
             $this->instance = $instance;
             parent::__construct($opts, $mh);
diff --git a/engines/special/wikipedia.php b/engines/special/wikipedia.php
index 8c60c46..0d792f7 100644
--- a/engines/special/wikipedia.php
+++ b/engines/special/wikipedia.php
@@ -1,5 +1,6 @@
 <?php
     class WikipediaRequest extends EngineRequest {
+        protected $wikipedia_domain;
         public function get_request_url() {
                 $this->wikipedia_domain = "wikipedia.org";
                 $query_encoded = urlencode($this->query);
diff --git a/engines/text/text.php b/engines/text/text.php
index e665f7c..15960e3 100644
--- a/engines/text/text.php
+++ b/engines/text/text.php
@@ -1,5 +1,6 @@
 <?php
     class TextSearch extends EngineRequest {
+        protected $engine, $engine_request, $special_request;
         public function __construct($opts, $mh) {
             $this->query = $opts->query;
             $this->page = $opts->page;
diff --git a/misc/search_engine.php b/misc/search_engine.php
index 378cae8..3bb8792 100644
--- a/misc/search_engine.php
+++ b/misc/search_engine.php
@@ -1,6 +1,8 @@
 <?php
     require "misc/cooldowns.php";
     abstract class EngineRequest {
+        protected $url, $query, $page, $opts, $mh, $ch;
+
         protected $DO_CACHING = true;
         function __construct($opts, $mh) {
             $this->query = $opts->query;