diff --git a/share/man/man5/src.conf.5 b/share/man/man5/src.conf.5
index 941afc63cfb8..981ca504de04 100644
--- a/share/man/man5/src.conf.5
+++ b/share/man/man5/src.conf.5
@@ -1,6 +1,6 @@
 .\" DO NOT EDIT-- this file is @generated by tools/build/options/makeman.
 .\" $FreeBSD$
-.Dd June 15, 2018
+.Dd June 20, 2018
 .Dt SRC.CONF 5
 .Os
 .Sh NAME
@@ -1481,6 +1481,22 @@ The
 and
 .Va WITHOUT_GCC
 options control those.
+.It Va WITHOUT_SYSTEM_LINKER
+Set to not opportunistically skip building a cross-linker during the
+bootstrap phase of the build.
+Normally, if the currently installed linker matches the planned bootstrap
+linker type and revision, then it will not be built.
+This does not prevent a linker from being built for installation though,
+only for building one for the build itself.
+The
+.Va WITHOUT_LLD
+and
+.Va WITHOUT_BINUTILS
+options control those.
+.Pp
+This option is only relevant when
+.Va WITH_LLD_BOOTSTRAP
+is set.
 .It Va WITHOUT_TALK
 Set to not build or install
 .Xr talk 1