From e9998c53350442cc145dc7d05b7d77b18cd6abe7 Mon Sep 17 00:00:00 2001
From: Travis Ralston <travpc@gmail.com>
Date: Mon, 25 May 2020 12:21:27 -0600
Subject: [PATCH] Clarify that server names are at least 1 character

Fixes https://github.com/matrix-org/matrix-doc/issues/2460
---
 specification/appendices/identifier_grammar.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/specification/appendices/identifier_grammar.rst b/specification/appendices/identifier_grammar.rst
index 4cce1f90..95c22fb1 100644
--- a/specification/appendices/identifier_grammar.rst
+++ b/specification/appendices/identifier_grammar.rst
@@ -45,7 +45,7 @@ following grammar::
     IPv6char    = DIGIT / %x41-46 / %x61-66 / ":" / "."
                       ; 0-9, A-F, a-f, :, .
 
-    dns-name    = *255dns-char
+    dns-name    = 1*255dns-char
 
     dns-char    = DIGIT / ALPHA / "-" / "."