diff --git a/machines/renge/services/matrix/mautrix-whatsapp.nix b/machines/renge/services/matrix/mautrix-whatsapp.nix
index c08f171..b743ebd 100644
--- a/machines/renge/services/matrix/mautrix-whatsapp.nix
+++ b/machines/renge/services/matrix/mautrix-whatsapp.nix
@@ -46,7 +46,10 @@ let
       reaction_notices = true;
       relay.enable = false;
     };
-    logging.print_level = "info";
+    logging = {
+      print_level = "info";
+      file_name_format = null;
+    };
   };
 
   generatedConfig = pkgs.runCommandNoCC "mautrix-whatsapp-config"