diff --git a/profiles/matrix.nix b/profiles/matrix.nix
index b8e4631..223cda2 100644
--- a/profiles/matrix.nix
+++ b/profiles/matrix.nix
@@ -64,7 +64,7 @@
         server_name = "mcwhirter.io"; # Server's public domain name
         tls_certificate_path = "/var/lib/acme/mcwhirter.io/fullchain.pem";
         tls_private_key_path = "/var/lib/acme/mcwhirter.io/key.pem";
-        turn_shared_secret = config.services.coturn.static-auth-secret;
+        turn_shared_secret = "${config.services.coturn.static-auth-secret-file}";
         turn_uris = [
           "turn:turn.mcwhirter.io:5349?transport=udp"
           "turn:turn.mcwhirter.io:5350?transport=udp"