diff --git a/pkgs/by-name/fl/flclash/package.nix b/pkgs/by-name/fl/flclash/package.nix
index eb941222e743..5efb29de1a11 100644
--- a/pkgs/by-name/fl/flclash/package.nix
+++ b/pkgs/by-name/fl/flclash/package.nix
@@ -83,6 +83,7 @@ flutter335.buildFlutterApplication {
       genericName = "FlClash";
       desktopName = "FlClash";
       categories = [ "Network" ];
+      startupWMClass = "com.follow.clash";
       keywords = [
         "FlClash"
         "Clash"