diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index e586c49a9..3424c63bb 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -1407,6 +1407,9 @@ class Server{
 	 * @return Server
 	 */
 	public static function getInstance() : Server{
+		if(self::$instance === null){
+			throw new \RuntimeException("Attempt to retrieve Server instance outside server thread");
+		}
 		return self::$instance;
 	}