diff --git a/systems/x86_64-linux/mx/default.nix b/systems/x86_64-linux/mx/default.nix
index 8e07450..a3d4285 100644
--- a/systems/x86_64-linux/mx/default.nix
+++ b/systems/x86_64-linux/mx/default.nix
@@ -29,7 +29,7 @@
   services.tailscale = {
     enable = true;
     useRoutingFeatures = "server";
-    extraSetFlags = [ "--advertise-exit-node" ];
+    extraSetFlags = [ "--advertise-exit-node=true" ];
   };
 
   metacfg = {