diff --git a/src/pocketmine/CrashDump.php b/src/pocketmine/CrashDump.php
index 5bfc6b569..b727d2afb 100644
--- a/src/pocketmine/CrashDump.php
+++ b/src/pocketmine/CrashDump.php
@@ -24,6 +24,7 @@ namespace pocketmine;
 use pocketmine\network\mcpe\protocol\ProtocolInfo;
 use pocketmine\plugin\PluginBase;
 use pocketmine\plugin\PluginLoadOrder;
+use pocketmine\plugin\PluginManager;
 use pocketmine\utils\Utils;
 use pocketmine\utils\VersionString;
 use raklib\RakLib;
@@ -86,7 +87,7 @@ class CrashDump{
 	}
 
 	private function pluginsData(){
-		if(class_exists("pocketmine\\plugin\\PluginManager", false)){
+		if($this->server->getPluginManager() instanceof PluginManager){
 			$this->addLine();
 			$this->addLine("Loaded plugins:");
 			$this->data["plugins"] = [];
diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index b8e38a28d..55072d40c 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -1937,8 +1937,10 @@ class Server{
 				UPnP::RemovePortForward($this->getPort());
 			}
 
-			$this->getLogger()->debug("Disabling all plugins");
-			$this->pluginManager->disablePlugins();
+			if($this->pluginManager instanceof PluginManager){
+				$this->getLogger()->debug("Disabling all plugins");
+				$this->pluginManager->disablePlugins();
+			}
 
 			foreach($this->players as $player){
 				$player->close($player->getLeaveMessage(), $this->getProperty("settings.shutdown-message", "Server closed"));