diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index b39f5e5..105a9bb 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -76,6 +76,7 @@
     };
   in
     prev.wrapFirefox (sandboxed-firefox-esr.config.env // {
+      gtk3 = prev.gtk3;
       inherit (prev.firefox-esr)
         version
         meta