diff --git a/share/man/man5/src.conf.5 b/share/man/man5/src.conf.5
index 9b185e77c12..9b1ef4c3e8d 100644
--- a/share/man/man5/src.conf.5
+++ b/share/man/man5/src.conf.5
@@ -1876,6 +1876,12 @@ not
 .Pa /etc/src.conf .
 .It Va WITHOUT_USB
 Do not build USB-related programs and libraries.
+When set, it enforces these options:
+.Pp
+.Bl -item -compact
+.It
+.Va WITHOUT_USB_GADGET_EXAMPLES
+.El
 .It Va WITHOUT_USB_GADGET_EXAMPLES
 Do not build USB gadget kernel modules.
 .It Va WITHOUT_UTMPX