diff --git a/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix b/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
index c04851d586b4..b6ed6ae9b228 100644
--- a/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
@@ -75,7 +75,7 @@ let
       icon = "wire-desktop";
       name = "wire-desktop";
       extraEntries = ''
-        StartupWMClass="Wire"
+        StartupWMClass=Wire
       '';
     };