diff --git a/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java b/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java
index 3ee824f1d..318dd87f7 100644
--- a/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java
+++ b/src/main/java/net/schmizz/sshj/sftp/RemoteFile.java
@@ -88,7 +88,7 @@ protected Promise<Response, SFTPException> asyncWrite(long fileOffset, byte[] da
             throws IOException {
         return requester.request(newRequest(PacketType.WRITE)
                                          .putUInt64(fileOffset)
-                                         .putUInt32(len - off)
+                                         .putUInt32(len)
                                          .putRawBytes(data, off, len)
         );
     }