diff --git a/src/js/operations/Compress.js b/src/js/operations/Compress.js
index a2dd33c6..7b7c875b 100755
--- a/src/js/operations/Compress.js
+++ b/src/js/operations/Compress.js
@@ -408,7 +408,7 @@ var Compress = {
         };
 
         Tarball.prototype.writeEndBlocks = function() {
-            var filler = new Array(512 * 1);
+            var filler = new Array(512 * 2);
             filler.fill(0);
             this.writeBytes(filler);
         };