diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index d18444d..7dec0ab 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -88,6 +88,7 @@
         extraPrefs
         extraPolicies
         nativeMessagingHosts
+        gtk3
         cfg;
     }) {
       applicationName = "firefox-esr";