diff --git a/pkgs/development/libraries/libffi/default.nix b/pkgs/development/libraries/libffi/default.nix
index 2031f175eab..681f9cbfb22 100644
--- a/pkgs/development/libraries/libffi/default.nix
+++ b/pkgs/development/libraries/libffi/default.nix
@@ -44,6 +44,7 @@ stdenv.mkDerivation rec {
 
   preCheck = ''
     # The tests use -O0 which is not compatible with -D_FORTIFY_SOURCE.
+    NIX_HARDENING_ENABLE=''${NIX_HARDENING_ENABLE/fortify3/}
     NIX_HARDENING_ENABLE=''${NIX_HARDENING_ENABLE/fortify/}
   '';