diff --git a/README.md b/README.md
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--- a/README.md
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@@ -13,6 +13,9 @@ It will output an ordered, newline-deliminated set of pathnames only after consu
 
 ## Options
 * `-r`, `--recursive <limit>` - Recursively sort input files, up to `<limit>` (set to 0 for infniite); if limit is not specified, recursion is infinite
+* `-z`, `-0`, `--nul` - Seperate lines when reading/writing by the ascii NUL character (0) instead of a newline. This applies to reading input from `stdin` as well as writing output.
+* `-I`, `--delim ifs` - Read the first byte of the IFS environment variable as the I/O line seperator.
+* `--delim <byte>` - Use this user-provided byte as the I/O line seperator
 * `-a`, `--atime` - Sort by atime
 * `-c`, `--ctime` - Sort by ctime (default)
 * `-m`, `--mtime` - Sort by mtime