diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index 8060895a2e0..0eda0739eab 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -2,7 +2,7 @@
 , src, unpackPhase ? null, patches ? []
 , extraNativeBuildInputs ? [], extraConfigureFlags ? [], extraMakeFlags ? [] }:
 
-{ lib, stdenv, pkgconfig, pango, perl, python2, python3, zip, libIDL
+{ lib, stdenv, pkgconfig, pango, perl, python2, python3, zip
 , libjpeg, zlib, dbus, dbus-glib, bzip2, xorg
 , freetype, fontconfig, file, nspr, nss, libnotify
 , yasm, libGLU, libGL, sqlite, unzip, makeWrapper
@@ -104,7 +104,7 @@ stdenv.mkDerivation ({
   patchFlags = [ "-p1" "-l" ];
 
   buildInputs = [
-    gtk2 perl zip libIDL libjpeg zlib bzip2
+    gtk2 perl zip libjpeg zlib bzip2
     dbus dbus-glib pango freetype fontconfig xorg.libXi xorg.libXcursor
     xorg.libX11 xorg.libXrender xorg.libXft xorg.libXt file
     libnotify xorg.pixman yasm libGLU libGL
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 27052d6217d..c4ac9ac1935 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19740,7 +19740,6 @@ in
 
   firefoxPackages = recurseIntoAttrs (callPackage ../applications/networking/browsers/firefox/packages.nix {
     callPackage = pkgs.newScope {
-      inherit (gnome2) libIDL;
       libpng = libpng_apng;
       python = python2;
       gnused = gnused_422;