extern off_t bytes_in; /* number of input bytes */
extern off_t bytes_out; /* number of output bytes */
+diff --git a/doc/gzip.texi b/doc/gzip.texi
+index 84887c3..ecd4e00 100644
+--- a/doc/gzip.texi
++++ b/doc/gzip.texi
+@@ -207,6 +207,7 @@ Mandatory arguments to long options are mandatory for short options too.
+ -V, --version display version number
+ -1, --fast compress faster
+ -9, --best compress better
++ --rsyncable Make rsync-friendly archive
+
+ With no FILE, or when FILE is -, read standard input.
+
+@@ -361,6 +362,14 @@ in the uncompressed input when syncronizing two files compressed with
+ this flag. @code{gunzip} cannot tell the difference between a
+ compressed file created with this option, and one created without it.
+
++@item --rsyncable
++While compressing, synchronize the output occasionally based on
++the input. This increases size by less than 1 percent most
++cases, but means that the @command{rsync} program can much more efficiently
++synchronize files compressed with this flag. @command{gunzip}
++cannot tell the difference between a compressed file created
++with this option, and one created without it.
++
+ @item --suffix @var{suf}
+ @itemx -S @var{suf}
+ Use suffix @var{suf} instead of @samp{.gz}. Any suffix can be