diff --git a/modules/services/matrix.nix b/modules/services/matrix.nix
index 2878f92..acc7ee9 100644
--- a/modules/services/matrix.nix
+++ b/modules/services/matrix.nix
@@ -97,7 +97,7 @@
               mail = "mail";
               name = "sn";
             };
-            binddn = "cn=synapse,ou=service-users,dc=crans,dc=org";
+            bind_dn = "cn=synapse,ou=service-users,dc=crans,dc=org";
             bind_password_file = config.age.secrets.ldap_synapse_password.path;
             filter = "(&(objectclass=inetOrgPerson)(objectclass=posixAccount))";
           };