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-rw-r--r--nixos/modules/services/networking/tinc.nix3
1 files changed, 2 insertions, 1 deletions
diff --git a/nixos/modules/services/networking/tinc.nix b/nixos/modules/services/networking/tinc.nix
index 6cb40185274d..79a0aa953feb 100644
--- a/nixos/modules/services/networking/tinc.nix
+++ b/nixos/modules/services/networking/tinc.nix
@@ -35,7 +35,8 @@ in
               description = ''
                 The name of the node which is used as an identifier when communicating
                 with the remote nodes in the mesh. If null then the hostname of the system
-                is used.
+                is used to derive a name (note that tinc may replace non-alphanumeric characters in
+                hostnames by underscores).
               '';
             };