diff --git a/src/librustc/middle/lint.rs b/src/librustc/middle/lint.rs
index ceb473da52fc0d008326e2149b2bcb8fa56dfe96..b3bd60d8ac7be80f8bd67a7e3af0138e63bdf40b 100644
--- a/src/librustc/middle/lint.rs
+++ b/src/librustc/middle/lint.rs
@@ -196,13 +196,6 @@ struct LintSpec {
         default: deny
      }),
 
-    ("deprecated_mutable_fields",
-     LintSpec {
-        lint: deprecated_mutable_fields,
-        desc: "deprecated mutable fields in structures",
-        default: deny
-    }),
-
     ("unused_unsafe",
      LintSpec {
         lint: unused_unsafe,
diff --git a/src/libsyntax/ext/deriving/generic.rs b/src/libsyntax/ext/deriving/generic.rs
index 565d6dd59baac533fb72371ebe3ffafe99e76d2f..d785f3816de30f0b07794b57882f71e2e89b2661 100644
--- a/src/libsyntax/ext/deriving/generic.rs
+++ b/src/libsyntax/ext/deriving/generic.rs
@@ -818,12 +818,8 @@ fn summarise_struct(cx: @ext_ctxt, span: span,
     let mut unnamed_count = 0;
     for struct_def.fields.each |field| {
         match field.node.kind {
-            ast::named_field(ident, _, _) => {
-                named_idents.push(ident)
-            }
-            ast::unnamed_field => {
-                unnamed_count += 1;
-            }
+            ast::named_field(ident, _) => named_idents.push(ident),
+            ast::unnamed_field => unnamed_count += 1,
         }
     }
 
diff --git a/src/libsyntax/ext/deriving/mod.rs b/src/libsyntax/ext/deriving/mod.rs
index d48ff98be06ee873cf3c45daafd0b31dfae5b319..2bd45e1466ce735e5f1aaadd7727abd3fcfaed91 100644
--- a/src/libsyntax/ext/deriving/mod.rs
+++ b/src/libsyntax/ext/deriving/mod.rs
@@ -281,8 +281,8 @@ pub fn create_struct_pattern(cx: @ext_ctxt,
 
     for struct_def.fields.eachi |i, struct_field| {
         let opt_id = match struct_field.node.kind {
-            ast::named_field(ident, _, _) if (struct_type == Unknown ||
-                                              struct_type == Record) => {
+            ast::named_field(ident, _) if (struct_type == Unknown ||
+                                           struct_type == Record) => {
                 struct_type = Record;
                 Some(ident)
             }