diff --git a/tools/build/options/WITH_BSD_GREP_FASTMATCH b/tools/build/options/WITH_BSD_GREP_FASTMATCH
new file mode 100644
index 00000000000..07af5f59d24
--- /dev/null
+++ b/tools/build/options/WITH_BSD_GREP_FASTMATCH
@@ -0,0 +1,3 @@
+.\" $FreeBSD$
+Set this option to use the fastmatch implementation in
+.Xr bsdgrep 1 .