diff --git a/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix b/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix
index de941d94fc875..8cf4fa1b5d1da 100644
--- a/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix
+++ b/pkgs/applications/networking/instant-messengers/riot/riot-desktop.nix
@@ -69,7 +69,7 @@ in yarn2nix-moretea.mkYarnPackage rec {
     comment = meta.description;
     categories = "Network;InstantMessaging;Chat;";
     extraEntries = ''
-      StartupWMClass="riot"
+      StartupWMClass=riot
     '';
   };