1 files changed, 2 insertions, 0 deletions
diff --git a/src/libsyntax_ext/lib.rs b/src/libsyntax_ext/lib.rs
index ebec23d0901..e872cfaeacb 100644
--- a/src/libsyntax_ext/lib.rs
+++ b/src/libsyntax_ext/lib.rs
@@ -57,6 +57,8 @@ use syntax::symbol::Symbol;
 pub fn register_builtins(resolver: &mut syntax::ext::base::Resolver,
                          user_exts: Vec<NamedSyntaxExtension>,
                          enable_quotes: bool) {
+    deriving::register_builtin_derives(resolver);
+
     let mut register = |name, ext| {
         resolver.add_ext(ast::Ident::with_empty_ctxt(name), Rc::new(ext));
     };