diff --git a/flashrom.8.tmpl b/flashrom.8.tmpl
index c1a228be7..5192d0b4f 100644
--- a/flashrom.8.tmpl
+++ b/flashrom.8.tmpl
@@ -242,6 +242,13 @@ Only flash region/image
 .B <imagename>
 from flash layout.
 .TP
+.B "\-\-flash\-contents <ref\-file>"
+The file contents of
+.BR <ref\-file>
+will be used to decide which parts of the flash need to be written. Providing
+this saves an initial read of the full flash chip. Be careful, if the provided
+data doesn't actually match the flash contents, results are undefined.
+.TP
 .B "\-L, \-\-list\-supported"
 List the flash chips, chipsets, mainboards, and external programmers
 (including PCI, USB, parallel port, and serial port based devices)