diff --git a/pkgs/development/libraries/gnutls/default.nix b/pkgs/development/libraries/gnutls/default.nix
index 86b88868e86..2edf8557641 100644
--- a/pkgs/development/libraries/gnutls/default.nix
+++ b/pkgs/development/libraries/gnutls/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   '';
 
   buildInputs = [zlib lzo libgcrypt]
-    ++ stdenv.optional guileBindings guile;
+    ++ stdenv.lib.optional guileBindings guile;
 
   doCheck = true;