diff --git a/TODO b/TODO
index 0686247..77ddf53 100644
--- a/TODO
+++ b/TODO
@@ -24,7 +24,7 @@
   [?] +C (noctcp) channel/usermode
 [F] kline/xline/resv sync
 [F] make an ability of using bandb instead of .conf files as bans storage
-[ ] drop non-TS6 (legacy protocol) support
+[/] drop non-TS6 (legacy protocol) support
 [F] module engine rework
   [F] more beautiful way of adding new channel modes by module
   [F] make nick/user/host validation functions/match tables able to work in separated modules,
diff --git a/include/config.h b/include/config.h
index d20bfd9..0470d2e 100644
--- a/include/config.h
+++ b/include/config.h
@@ -88,14 +88,6 @@
  */
 #define  HIDE_SERVERS_IPS
 
-/* TS6_ONLY
- *
- * If this is defined only TS6 servers may link to the network.  See
- * doc/TS6.txt for more information.  If your network has old servers
- * (hyb7.0, ircd-ratbox-1.x, +CSr) or hybserv you should NOT define this.
- */
-#undef TS6_ONLY
-
 /* HANGONGOODLINK and HANGONRETRYDELAY
  * Often net breaks for a short time and it's useful to try to
  * establishing the same connection again faster than CONNECTFREQUENCY
diff --git a/include/config.h.dist b/include/config.h.dist
index d20bfd9..0470d2e 100644
--- a/include/config.h.dist
+++ b/include/config.h.dist
@@ -88,14 +88,6 @@
  */
 #define  HIDE_SERVERS_IPS
 
-/* TS6_ONLY
- *
- * If this is defined only TS6 servers may link to the network.  See
- * doc/TS6.txt for more information.  If your network has old servers
- * (hyb7.0, ircd-ratbox-1.x, +CSr) or hybserv you should NOT define this.
- */
-#undef TS6_ONLY
-
 /* HANGONGOODLINK and HANGONRETRYDELAY
  * Often net breaks for a short time and it's useful to try to
  * establishing the same connection again faster than CONNECTFREQUENCY