diff --git a/nixos/modules/services/audio/tts.nix b/nixos/modules/services/audio/tts.nix
index 1a355c8ee39f..0d93224ec030 100644
--- a/nixos/modules/services/audio/tts.nix
+++ b/nixos/modules/services/audio/tts.nix
@@ -134,6 +134,7 @@ in
           ProtectProc = "invisible";
           ProcSubset = "pid";
           RestrictAddressFamilies = [
+            "AF_UNIX"
             "AF_INET"
             "AF_INET6"
           ];