diff --git a/library/src/main/java/com/aspsine/multithreaddownload/core/DownloaderImpl.java b/library/src/main/java/com/aspsine/multithreaddownload/core/DownloaderImpl.java
index ed3af93..b2b414d 100644
--- a/library/src/main/java/com/aspsine/multithreaddownload/core/DownloaderImpl.java
+++ b/library/src/main/java/com/aspsine/multithreaddownload/core/DownloaderImpl.java
@@ -254,7 +254,7 @@ private List<ThreadInfo> getMultiThreadInfos(long length) {
                 final long start = average * i;
                 final long end;
                 if (i == threadNum - 1) {
-                    end = length;
+                    end = length - 1;
                 } else {
                     end = start + average - 1;
                 }