diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 08a51a9275be..d4515b8694e7 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3304,6 +3304,7 @@ let
 
   icedtea7_web = callPackage ../development/compilers/icedtea-web {
     jdk = "${icedtea7_jdk}/lib/icedtea";
+    xulrunner = firefox;
   };
 
   ikarus = callPackage ../development/compilers/ikarus { };