diff --git a/src/librustc/driver/session.rs b/src/librustc/driver/session.rs
index 4896bb826bff..4d25beb1b763 100644
--- a/src/librustc/driver/session.rs
+++ b/src/librustc/driver/session.rs
@@ -360,7 +360,7 @@ mod test {
         let mut attrs = ~[];
         if with_bin { attrs += ~[make_crate_type_attr(~"bin")]; }
         if with_lib { attrs += ~[make_crate_type_attr(~"lib")]; }
-        @ast_util::respan(ast_util::dummy_sp(), {
+        @ast_util::respan(ast_util::dummy_sp(), ast::crate_ {
             module: {view_items: ~[], items: ~[]},
             attrs: attrs,
             config: ~[]