diff --git a/tools/build/options/WITH_BINUTILS b/tools/build/options/WITH_BINUTILS
index bead517f43c4..717c5fad861f 100644
--- a/tools/build/options/WITH_BINUTILS
+++ b/tools/build/options/WITH_BINUTILS
@@ -2,3 +2,5 @@
 Build and install GNU
 .Xr as 1
 as part of the normal system build.
+This option is not available as of
+.Fx 13.0 .