diff --git a/nixos/modules/services/networking/radicale.nix b/nixos/modules/services/networking/radicale.nix
index d210efe14b3c..76e74e07a4e5 100644
--- a/nixos/modules/services/networking/radicale.nix
+++ b/nixos/modules/services/networking/radicale.nix
@@ -205,6 +205,7 @@ in
         RestrictAddressFamilies = [
           "AF_INET"
           "AF_INET6"
+          "AF_UNIX" # To log with systemd
         ];
         RestrictNamespaces = true;
         RestrictRealtime = true;