diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 01d120deb81..f3977642b1d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7831,9 +7831,7 @@ let
     amdappsdk = amdappsdk28;
   };
 
-  chatzilla = callPackage ../applications/networking/irc/chatzilla {
-    xulrunner = firefox36Pkgs.xulrunner;
-  };
+  chatzilla = callPackage ../applications/networking/irc/chatzilla { };
 
   chromium = lowPrio (callPackage ../applications/networking/browsers/chromium {
     channel = "stable";