diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index fb27724e369d..4988adf93734 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -87,7 +87,7 @@ enum def {
     def_upvar(node_id /* local id of closed over var */,
               @def    /* closed over def */,
               node_id /* expr node that creates the closure */),
-    def_class(def_id),
+    def_class(def_id, bool /* has constructor */),
     def_region(node_id)
 }
 
diff --git a/src/libsyntax/ast_util.rs b/src/libsyntax/ast_util.rs
index 37e8671facd3..0cf593efdc30 100644
--- a/src/libsyntax/ast_util.rs
+++ b/src/libsyntax/ast_util.rs
@@ -53,7 +53,7 @@ pure fn def_id_of_def(d: def) -> def_id {
       def_fn(id, _) | def_mod(id) |
       def_foreign_mod(id) | def_const(id) |
       def_variant(_, id) | def_ty(id) | def_ty_param(id, _) |
-      def_use(id) | def_class(id) { id }
+      def_use(id) | def_class(id, _) { id }
       def_arg(id, _) | def_local(id, _) | def_self(id) |
       def_upvar(id, _, _) | def_binding(id) | def_region(id) {
         local_def(id)
diff --git a/src/rustc/metadata/decoder.rs b/src/rustc/metadata/decoder.rs
index a5261d039c19..83684413641f 100644
--- a/src/rustc/metadata/decoder.rs
+++ b/src/rustc/metadata/decoder.rs
@@ -283,7 +283,8 @@ fn item_to_def_like(item: ebml::doc, did: ast::def_id, cnum: ast::crate_num)
     let fam_ch = item_family(item);
     alt fam_ch {
       'c' { dl_def(ast::def_const(did)) }
-      'C' { dl_def(ast::def_class(did)) }
+      'C' { dl_def(ast::def_class(did, true)) }
+      'S' { dl_def(ast::def_class(did, false)) }
       'u' { dl_def(ast::def_fn(did, ast::unsafe_fn)) }
       'f' { dl_def(ast::def_fn(did, ast::impure_fn)) }
       'p' { dl_def(ast::def_fn(did, ast::pure_fn)) }
@@ -707,7 +708,7 @@ fn family_has_type_params(fam_ch: char) -> bool {
     alt check fam_ch {
       'c' | 'T' | 'm' | 'n' | 'g' | 'h' | 'j' { false }
       'f' | 'u' | 'p' | 'F' | 'U' | 'P' | 'y' | 't' | 'v' | 'i' | 'I' | 'C'
-          | 'a'
+          | 'a' | 'S'
           { true }
     }
 }
@@ -751,6 +752,7 @@ fn item_family_to_str(fam: char) -> ~str {
       'i' { ret ~"impl"; }
       'I' { ret ~"trait"; }
       'C' { ret ~"class"; }
+      'S' { ret ~"struct"; }
       'g' { ret ~"public field"; }
       'j' { ret ~"private field"; }
     }
diff --git a/src/rustc/metadata/encoder.rs b/src/rustc/metadata/encoder.rs
index b4818959344b..e1ed9fe396aa 100644
--- a/src/rustc/metadata/encoder.rs
+++ b/src/rustc/metadata/encoder.rs
@@ -663,7 +663,16 @@ fn encode_info_for_item(ecx: @encode_ctxt, ebml_w: ebml::writer, item: @item,
         /* Now, make an item for the class itself */
         ebml_w.start_tag(tag_items_data_item);
         encode_def_id(ebml_w, local_def(item.id));
-        encode_family(ebml_w, 'C');
+
+        alt ctor {
+            none {
+                encode_family(ebml_w, 'S');
+            }
+            some(_) {
+                encode_family(ebml_w, 'C');
+            }
+        }
+
         encode_type_param_bounds(ebml_w, ecx, tps);
         encode_type(ecx, ebml_w, node_id_to_type(tcx, item.id));
         encode_name(ebml_w, item.ident);
diff --git a/src/rustc/middle/astencode.rs b/src/rustc/middle/astencode.rs
index 002b4d97e23a..1f5f7c4518d5 100644
--- a/src/rustc/middle/astencode.rs
+++ b/src/rustc/middle/astencode.rs
@@ -369,8 +369,8 @@ impl of tr for ast::def {
           ast::def_upvar(nid1, def, nid2) {
             ast::def_upvar(xcx.tr_id(nid1), @(*def).tr(xcx), xcx.tr_id(nid2))
           }
-          ast::def_class(did) {
-            ast::def_class(did.tr(xcx))
+          ast::def_class(did, has_constructor) {
+            ast::def_class(did.tr(xcx), has_constructor)
           }
           ast::def_region(nid) { ast::def_region(xcx.tr_id(nid)) }
         }
diff --git a/src/rustc/middle/borrowck/categorization.rs b/src/rustc/middle/borrowck/categorization.rs
index f5879145a9d4..4088945e550e 100644
--- a/src/rustc/middle/borrowck/categorization.rs
+++ b/src/rustc/middle/borrowck/categorization.rs
@@ -196,7 +196,7 @@ impl public_methods for borrowck_ctxt {
           ast::def_foreign_mod(_) | ast::def_const(_) |
           ast::def_use(_) | ast::def_variant(_, _) |
           ast::def_ty(_) | ast::def_prim_ty(_) |
-          ast::def_ty_param(_, _) | ast::def_class(_) |
+          ast::def_ty_param(_, _) | ast::def_class(_, _) |
           ast::def_region(_) {
             @{id:id, span:span,
               cat:cat_special(sk_static_item), lp:none,
diff --git a/src/rustc/middle/region.rs b/src/rustc/middle/region.rs
index ca00aeaa0f4a..cc6874bc9679 100644
--- a/src/rustc/middle/region.rs
+++ b/src/rustc/middle/region.rs
@@ -467,7 +467,7 @@ fn determine_rp_in_ty(ty: @ast::ty,
     alt ty.node {
       ast::ty_path(_, id) {
         alt cx.def_map.get(id) {
-          ast::def_ty(did) | ast::def_class(did) {
+          ast::def_ty(did) | ast::def_class(did, _) {
             if did.crate == ast::local_crate {
                 cx.add_dep(did.node, cx.item_id);
             } else {
diff --git a/src/rustc/middle/resolve3.rs b/src/rustc/middle/resolve3.rs
index bddf83c429e7..e75268cde7f6 100644
--- a/src/rustc/middle/resolve3.rs
+++ b/src/rustc/middle/resolve3.rs
@@ -41,7 +41,7 @@ import syntax::visit::{visit_mod, visit_ty, vt};
 
 import box::ptr_eq;
 import dvec::{dvec, extensions};
-import option::get;
+import option::{get, is_some};
 import str::{connect, split_str};
 import vec::pop;
 
@@ -604,7 +604,7 @@ class Resolver {
     let unused_import_lint_level: level;
 
     let trait_info: hashmap<def_id,@hashmap<Atom,()>>;
-    let structs: hashmap<def_id,()>;
+    let structs: hashmap<def_id,bool>;
 
     // The number of imports that are currently unresolved.
     let mut unresolved_imports: uint;
@@ -926,7 +926,8 @@ class Resolver {
                 (*name_bindings).define_impl(impl_info);
 
                 // Record the def ID of this struct.
-                self.structs.insert(local_def(item.id), ());
+                self.structs.insert(local_def(item.id),
+                                    is_some(optional_ctor));
 
                 visit_item(item, new_parent, visitor);
             }
@@ -1378,12 +1379,16 @@ class Resolver {
 
                             (*child_name_bindings).define_type(def);
                         }
-                        def_class(def_id) {
+                        def_class(def_id, has_constructor) {
                             #debug("(building reduced graph for external \
-                                    crate) building value and type %s",
-                                    final_ident);
-                            (*child_name_bindings).define_value(def);
+                                    crate) building type %s (value? %d)",
+                                    final_ident,
+                                    if has_constructor { 1 } else { 0 });
                             (*child_name_bindings).define_type(def);
+
+                            if has_constructor {
+                                (*child_name_bindings).define_value(def);
+                            }
                         }
                         def_self(*) | def_arg(*) | def_local(*) |
                         def_prim_ty(*) | def_ty_param(*) | def_binding(*) |
@@ -4201,7 +4206,9 @@ class Resolver {
                     some(definition @ def_ty(class_id))
                             if self.structs.contains_key(class_id) {
 
-                        self.record_def(expr.id, def_class(class_id));
+                        let has_constructor = self.structs.get(class_id);
+                        let class_def = def_class(class_id, has_constructor);
+                        self.record_def(expr.id, class_def);
                     }
                     _ {
                         self.session.span_err(path.span,
diff --git a/src/rustc/middle/ty.rs b/src/rustc/middle/ty.rs
index b6b1873b1dc2..465aeebe3af2 100644
--- a/src/rustc/middle/ty.rs
+++ b/src/rustc/middle/ty.rs
@@ -2587,7 +2587,7 @@ fn type_err_to_str(cx: ctxt, err: type_err) -> ~str {
 
 fn def_has_ty_params(def: ast::def) -> bool {
     alt def {
-      ast::def_fn(_, _) | ast::def_variant(_, _) | ast::def_class(_)
+      ast::def_fn(_, _) | ast::def_variant(_, _) | ast::def_class(_, _)
         { true }
       _ { false }
     }
diff --git a/src/rustc/middle/typeck/astconv.rs b/src/rustc/middle/typeck/astconv.rs
index ebd189a15b71..3baea12ab484 100644
--- a/src/rustc/middle/typeck/astconv.rs
+++ b/src/rustc/middle/typeck/astconv.rs
@@ -270,7 +270,7 @@ fn ast_ty_to_ty<AC: ast_conv, RS: region_scope copy owned>(
                                                        path_to_str(path))); }
           some(d) { d }};
         alt a_def {
-          ast::def_ty(did) | ast::def_class(did) {
+          ast::def_ty(did) | ast::def_class(did, _) {
             ast_path_to_ty(self, rscope, did, path, id).ty
           }
           ast::def_prim_ty(nty) {
diff --git a/src/rustc/middle/typeck/check.rs b/src/rustc/middle/typeck/check.rs
index 0b78fd1a5054..eaf0e90b26d6 100644
--- a/src/rustc/middle/typeck/check.rs
+++ b/src/rustc/middle/typeck/check.rs
@@ -1649,7 +1649,7 @@ fn check_expr_with_unifier(fcx: @fn_ctxt,
         // Resolve the path.
         let class_id;
         alt tcx.def_map.find(id) {
-            some(ast::def_class(type_def_id)) => {
+            some(ast::def_class(type_def_id, _)) => {
                 class_id = type_def_id;
             }
             _ => {
@@ -2160,7 +2160,7 @@ fn ty_param_bounds_and_ty_for_def(fcx: @fn_ctxt, sp: span, defn: ast::def) ->
       }
 
       ast::def_fn(id, _) | ast::def_const(id) |
-      ast::def_variant(_, id) | ast::def_class(id) {
+      ast::def_variant(_, id) | ast::def_class(id, _) {
         ret ty::lookup_item_type(fcx.ccx.tcx, id);
       }
       ast::def_binding(nid) {
diff --git a/src/rustc/middle/typeck/check/regionmanip.rs b/src/rustc/middle/typeck/check/regionmanip.rs
index 2231d9b320aa..d1052fd6a2ab 100644
--- a/src/rustc/middle/typeck/check/regionmanip.rs
+++ b/src/rustc/middle/typeck/check/regionmanip.rs
@@ -200,7 +200,7 @@ fn region_of(fcx: @fn_ctxt, expr: @ast::expr) -> ty::region {
           ast::def_foreign_mod(_) | ast::def_const(_) |
           ast::def_use(_) | ast::def_variant(_, _) |
           ast::def_ty(_) | ast::def_prim_ty(_) |
-          ast::def_ty_param(_, _) | ast::def_class(_) |
+          ast::def_ty_param(_, _) | ast::def_class(_, _) |
           ast::def_region(_) {
             ty::re_static
           }