diff --git a/src/or/auth_dirs.inc b/src/or/auth_dirs.inc
index 58e6817c86..e0937541ea 100644
--- a/src/or/auth_dirs.inc
+++ b/src/or/auth_dirs.inc
@@ -16,6 +16,7 @@
   "131.188.40.189:80 F204 4413 DAC2 E02E 3D6B CF47 35A1 9BCA 1DE9 7281",
 "dannenberg orport=443 "
   "v3ident=0232AF901C31A04EE9848595AF9BB7620D4C5B2E "
+  "ipv6=[2001:678:558:1000::244]:443 "
   "193.23.244.244:80 7BE6 83E6 5D48 1413 21C5 ED92 F075 C553 64AC 7123",
 "maatuska orport=80 "
   "v3ident=49015F787433103580E3B66A1707A00E60F2D15B "