diff --git a/LauncherCore/src/main/java/pro/gravit/utils/Downloader.java b/LauncherCore/src/main/java/pro/gravit/utils/Downloader.java
index 2eb9e4ac..0208a169 100644
--- a/LauncherCore/src/main/java/pro/gravit/utils/Downloader.java
+++ b/LauncherCore/src/main/java/pro/gravit/utils/Downloader.java
@@ -11,6 +11,8 @@
 public class Downloader {
     public interface DownloadCallback {
         void apply(long fullDiff);
+
+        void onComplete(Path path);
     }
 
     private final CompletableFuture<Void> future;