diff --git a/pkgs/tools/graphics/graphviz/default.nix b/pkgs/tools/graphics/graphviz/default.nix
index bb0d54a7ec29..9a9621dd784e 100644
--- a/pkgs/tools/graphics/graphviz/default.nix
+++ b/pkgs/tools/graphics/graphviz/default.nix
@@ -12,11 +12,11 @@ stdenv.mkDerivation rec {
     sha256 = "17l5czpvv5ilmg17frg0w4qwf89jzh2aglm9fgx0l0aakn6j7al1";
   };
 
-  #hardening_all = false;
+  hardening_fortify = false;
 
   patches =
     [ ./0001-vimdot-lookup-vim-in-PATH.patch
-    
+
       # NOTE: Once this patch is removed, flex can probably be removed from
       # buildInputs.
       ./cve-2014-9157.patch