diff --git a/pkgs/by-name/te/teamspeak6-client/package.nix b/pkgs/by-name/te/teamspeak6-client/package.nix
index b5c0332165df..20b054a85dd1 100644
--- a/pkgs/by-name/te/teamspeak6-client/package.nix
+++ b/pkgs/by-name/te/teamspeak6-client/package.nix
@@ -86,6 +86,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
         "Chat"
         "Network"
       ];
+      startupWMClass = "teamspeak-client";
     })
   ];