diff --git a/mk/defaults/options.description b/mk/defaults/options.description
index 03e4d61a0c8e..6b7c619b89e4 100644
--- a/mk/defaults/options.description
+++ b/mk/defaults/options.description
@@ -478,6 +478,7 @@ syslog			Enable syslog support.
 syslogng-spoof		Spoof the original source address of forwarded packets.
 tcl			Enable Tcl scripting support.
 tcpwrappers		Enable tcpwrappers support.
+tests			Build and install tests.
 theora			Use the theora codecs.
 threads			Enable threads support.
 tin-use-inn-spool	Use the INN spool directories.