diff --git a/pkgs/applications/networking/instant-messengers/discord/linux.nix b/pkgs/applications/networking/instant-messengers/discord/linux.nix
index b513aa380489..d0d8a85bc199 100644
--- a/pkgs/applications/networking/instant-messengers/discord/linux.nix
+++ b/pkgs/applications/networking/instant-messengers/discord/linux.nix
@@ -220,6 +220,7 @@ stdenv.mkDerivation rec {
       "InstantMessaging"
     ];
     mimeTypes = [ "x-scheme-handler/discord" ];
+    startupWMClass = "discord";
   };
 
   passthru = {