diff --git a/settings/hyprland.nix b/settings/hyprland.nix
index eb90b6a..15b3953 100644
--- a/settings/hyprland.nix
+++ b/settings/hyprland.nix
@@ -108,6 +108,13 @@ in
 
         settings = {
           # monitor is set per-host in hosts/FredOS-{Gaming,Macbook}.nix
+
+          # Battle.net tray icon leaks as a tiny floating XWayland window with
+          # class steam_app_0 and an empty title — send it to the void.
+          windowrulev2 = [
+            "workspace special silent, class:^(steam_app_0)$, title:^()$, floating:1"
+          ];
+
           env = [
             # Clear the LD_PRELOAD set by the start-hyprland wrapper so it
             # doesn't leak into child processes (Steam, games, etc.).