diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index 46765d6..60551cf 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -76,7 +76,7 @@
     };
   in
     prev.wrapFirefox sandboxed-firefox-esr.config.env {
-      pname = "firefox-esr";
+      applicationName = "firefox-esr";
       desktopName = "Firefox ESR (Sandboxed)";
       extraPolicies = {
         DisableAppUpdate = true;