diff --git a/lib/archive/tar/minitar/writer.rb b/lib/archive/tar/minitar/writer.rb
index 1486344..a6d9986 100644
--- a/lib/archive/tar/minitar/writer.rb
+++ b/lib/archive/tar/minitar/writer.rb
@@ -308,7 +308,7 @@ def write_header(header, long_name, short_name, prefix, needs_long_name)
           :prefix => "",
           :name => PosixHeader::GNU_EXT_LONG_LINK,
           :typeflag => "L",
-          :size => long_name.length,
+          :size => long_name.length + 1,
           :mode => 0
         }
         @io.write(PosixHeader.new(long_name_header))