diff --git a/system/common.nix b/system/common.nix
index 558b32d..8c477cf 100644
--- a/system/common.nix
+++ b/system/common.nix
@@ -206,7 +206,8 @@
 
   # Enable sound with pipewire.
   services.pulseaudio.enable = false; # pipewire >>>>>>> pulseaudio
-  security.rtkit.enable = true;
+  # BUG! disable rtkit in order to fix mumble: https://github.com/NixOS/nixpkgs/issues/392992#issuecomment-2799867278
+  security.rtkit.enable = false;
   services.pipewire = {
     enable = true;
     alsa.enable = true;