diff --git a/src/librustc/driver/driver.rs b/src/librustc/driver/driver.rs
index 572397b7f8a..00621573b88 100644
--- a/src/librustc/driver/driver.rs
+++ b/src/librustc/driver/driver.rs
@@ -239,7 +239,7 @@ pub fn compile_rest(sess: Session,
     let (llmod, link_meta) = {
 
         let ty_cx = ty::mk_ctxt(sess, def_map, ast_map, freevars,
-                                region_map, rp_set, lang_items, crate);
+                                region_map, rp_set, lang_items);
 
         // passes are timed inside typeck
         let (method_map, vtable_map) = typeck::check_crate(
diff --git a/src/librustc/middle/ty.rs b/src/librustc/middle/ty.rs
index b80b4855538..1a2a84ceae8 100644
--- a/src/librustc/middle/ty.rs
+++ b/src/librustc/middle/ty.rs
@@ -232,7 +232,6 @@ struct ctxt_ {
     diag: @syntax::diagnostic::span_handler,
     interner: @mut HashMap<intern_key, ~t_box_>,
     next_id: @mut uint,
-    legacy_modes: bool,
     cstore: @mut metadata::cstore::CStore,
     sess: session::Session,
     def_map: resolve::DefMap,
@@ -906,24 +905,12 @@ pub fn mk_ctxt(s: session::Session,
                freevars: freevars::freevar_map,
                region_maps: @mut middle::region::RegionMaps,
                region_paramd_items: middle::region::region_paramd_items,
-               lang_items: middle::lang_items::LanguageItems,
-               crate: @ast::crate)
+               lang_items: middle::lang_items::LanguageItems)
             -> ctxt {
-    let mut legacy_modes = false;
-    for crate.node.attrs.each |attribute| {
-        match attribute.node.value.node {
-            ast::meta_word(w) if *w == ~"legacy_modes" => {
-                legacy_modes = true;
-            }
-            _ => {}
-        }
-    }
-
     @ctxt_ {
         diag: s.diagnostic(),
         interner: @mut HashMap::new(),
         next_id: @mut primitives::LAST_PRIMITIVE_ID,
-        legacy_modes: legacy_modes,
         cstore: s.cstore,
         sess: s,
         def_map: dm,
diff --git a/src/librustc/middle/typeck/infer/test.rs b/src/librustc/middle/typeck/infer/test.rs
index 1d24a4dbd4f..f2a72e07a57 100644
--- a/src/librustc/middle/typeck/infer/test.rs
+++ b/src/librustc/middle/typeck/infer/test.rs
@@ -67,7 +67,7 @@ fn setup_env(test_name: &str, source_string: &str) -> Env {
         cfg, parse_sess);
 
     let tcx = ty::mk_ctxt(sess, dm, amap, freevars, region_map,
-                          region_paramd_items, lang_items, crate);
+                          region_paramd_items, lang_items);
 
     let infcx = infer::new_infer_ctxt(tcx);