diff --git a/tools/tools/README b/tools/tools/README
index fb28a807d9dc..8b0d27985e39 100644
--- a/tools/tools/README
+++ b/tools/tools/README
@@ -35,6 +35,8 @@ kerncruft	Shellscript to find orphaned *.c files in /sys
 kerninclude	Shellscript to find unused #includes in the kernel.
 kernxref	Shellscript to cross reference symbols in the LINT kernel.
 kttcp		An in-kernel version of the ttcp network performance tool
+mfc		Merge a directory from HEAD to a branch where it does not
+		already exist.
 mid	 	Create a Message-ID database for mailing lists.
 pciid		Generate src/share/misc/pci_vendors.
 portsinfo 	Generate list of new ports for last two weeks.