diff --git a/serde_codegen/Cargo.toml b/serde_codegen/Cargo.toml
index e068c198..4cdc20ce 100644
--- a/serde_codegen/Cargo.toml
+++ b/serde_codegen/Cargo.toml
@@ -18,7 +18,7 @@ with-syntex = [
     "quasi/with-syntex",
     "quasi_codegen",
     "quasi_codegen/with-syntex",
-    "serde_item/with-syntex",
+    "serde_internals/with-syntex",
     "syntex",
     "syntex_syntax",
 ]
@@ -32,6 +32,6 @@ aster = { version = "^0.19.0", default-features = false }
 clippy = { version = "^0.*", optional = true }
 quasi = { version = "^0.13.0", default-features = false }
 quasi_macros = { version = "^0.13.0", optional = true }
-serde_item = { version = "^0.2.0", path = "../serde_item", default-features = false }
+serde_internals = { version = "^0.1.0", path = "../serde_internals", default-features = false }
 syntex = { version = "^0.36.0", optional = true }
 syntex_syntax = { version = "^0.36.0", optional = true }
diff --git a/serde_codegen/src/bound.rs b/serde_codegen/src/bound.rs
index 0acbcab8..9e6b182d 100644
--- a/serde_codegen/src/bound.rs
+++ b/serde_codegen/src/bound.rs
@@ -6,7 +6,7 @@ use syntax::ast;
 use syntax::ptr::P;
 use syntax::visit;
 
-use item::{attr, Item};
+use internals::{attr, Item};
 
 // Remove the default from every type parameter because in the generated impls
 // they look like associated types: "error: associated type bindings are not
diff --git a/serde_codegen/src/de.rs b/serde_codegen/src/de.rs
index 175d7c22..d3c236bf 100644
--- a/serde_codegen/src/de.rs
+++ b/serde_codegen/src/de.rs
@@ -7,8 +7,7 @@ use syntax::parse::token::InternedString;
 use syntax::ptr::P;
 
 use bound;
-use error::Error;
-use item::{self, attr};
+use internals::{attr, Body, Error, Field, Item, Style, Variant};
 
 pub fn expand_derive_deserialize(
     cx: &mut ExtCtxt,
@@ -27,9 +26,9 @@ pub fn expand_derive_deserialize(
         }
     };
 
-    let item = match item::Item::from_ast(cx, item) {
+    let item = match Item::from_ast(cx, item) {
         Ok(item) => item,
-        Err(item::Error::UnexpectedItemKind) => {
+        Err(Error::UnexpectedItemKind) => {
             cx.span_err(item.span,
                 "`#[derive(Deserialize)]` may only be applied to structs and enums");
             return;
@@ -49,7 +48,7 @@ pub fn expand_derive_deserialize(
 fn deserialize_item(
     cx: &ExtCtxt,
     builder: &aster::AstBuilder,
-    item: &item::Item,
+    item: &Item,
 ) -> P<ast::Item> {
     let impl_generics = build_impl_generics(builder, &item);
 
@@ -88,7 +87,7 @@ fn deserialize_item(
 // each generic field type that will be set to a default value.
 fn build_impl_generics(
     builder: &aster::AstBuilder,
-    item: &item::Item,
+    item: &Item,
 ) -> ast::Generics {
     let generics = bound::without_defaults(item.generics);
 
@@ -131,12 +130,12 @@ fn requires_default(attrs: &attr::Field) -> bool {
 fn deserialize_body(
     cx: &ExtCtxt,
     builder: &aster::AstBuilder,
-    item: &item::Item,
+    item: &Item,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
 ) -> P<ast::Expr> {
     match item.body {
-        item::Body::Enum(ref variants) => {
+        Body::Enum(ref variants) => {
             deserialize_item_enum(
                 cx,
                 builder,
@@ -146,7 +145,7 @@ fn deserialize_body(
                 variants,
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Struct, ref fields) => {
+        Body::Struct(Style::Struct, ref fields) => {
             if fields.iter().any(|field| field.ident.is_none()) {
                 cx.span_bug(item.span, "struct has unnamed fields")
             }
@@ -161,8 +160,8 @@ fn deserialize_body(
                 fields,
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Tuple, ref fields) |
-        item::Body::Struct(item::Style::Newtype, ref fields) => {
+        Body::Struct(Style::Tuple, ref fields) |
+        Body::Struct(Style::Newtype, ref fields) => {
             if fields.iter().any(|field| field.ident.is_some()) {
                 cx.span_bug(item.span, "tuple struct has named fields")
             }
@@ -177,7 +176,7 @@ fn deserialize_body(
                 fields,
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Unit, _) => {
+        Body::Struct(Style::Unit, _) => {
             deserialize_unit_struct(
                 cx,
                 builder,
@@ -308,7 +307,7 @@ fn deserialize_tuple(
     variant_ident: Option<Ident>,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
-    fields: &[item::Field],
+    fields: &[Field],
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let where_clause = &impl_generics.where_clause;
@@ -390,7 +389,7 @@ fn deserialize_seq(
     type_ident: Ident,
     type_path: ast::Path,
     impl_generics: &ast::Generics,
-    fields: &[item::Field],
+    fields: &[Field],
     is_struct: bool,
 ) -> P<ast::Expr> {
     let let_values: Vec<_> = fields.iter()
@@ -470,7 +469,7 @@ fn deserialize_newtype_struct(
     type_ident: Ident,
     type_path: &ast::Path,
     impl_generics: &ast::Generics,
-    field: &item::Field,
+    field: &Field,
 ) -> Vec<ast::TokenTree> {
     let value = match field.attrs.deserialize_with() {
         None => {
@@ -505,7 +504,7 @@ fn deserialize_struct(
     variant_ident: Option<Ident>,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
-    fields: &[item::Field],
+    fields: &[Field],
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let where_clause = &impl_generics.where_clause;
@@ -587,7 +586,7 @@ fn deserialize_item_enum(
     type_ident: Ident,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
-    variants: &[item::Variant],
+    variants: &[Variant],
     item_attrs: &attr::Item
 ) -> P<ast::Expr> {
     let where_clause = &impl_generics.where_clause;
@@ -678,19 +677,19 @@ fn deserialize_variant(
     type_ident: Ident,
     generics: &ast::Generics,
     ty: P<ast::Ty>,
-    variant: &item::Variant,
+    variant: &Variant,
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let variant_ident = variant.ident;
 
     match variant.style {
-        item::Style::Unit => {
+        Style::Unit => {
             quote_expr!(cx, {
                 try!(visitor.visit_unit());
                 Ok($type_ident::$variant_ident)
             })
         }
-        item::Style::Newtype => {
+        Style::Newtype => {
             deserialize_newtype_variant(
                 cx,
                 builder,
@@ -700,7 +699,7 @@ fn deserialize_variant(
                 &variant.fields[0],
             )
         }
-        item::Style::Tuple => {
+        Style::Tuple => {
             deserialize_tuple(
                 cx,
                 builder,
@@ -712,7 +711,7 @@ fn deserialize_variant(
                 item_attrs,
             )
         }
-        item::Style::Struct => {
+        Style::Struct => {
             deserialize_struct(
                 cx,
                 builder,
@@ -733,7 +732,7 @@ fn deserialize_newtype_variant(
     type_ident: Ident,
     variant_ident: Ident,
     impl_generics: &ast::Generics,
-    field: &item::Field,
+    field: &Field,
 ) -> P<ast::Expr> {
     let visit = match field.attrs.deserialize_with() {
         None => {
@@ -919,7 +918,7 @@ fn deserialize_struct_visitor(
     type_ident: Ident,
     struct_path: ast::Path,
     impl_generics: &ast::Generics,
-    fields: &[item::Field],
+    fields: &[Field],
     item_attrs: &attr::Item,
 ) -> (Vec<P<ast::Item>>, ast::Stmt, P<ast::Expr>) {
     let field_exprs = fields.iter()
@@ -971,7 +970,7 @@ fn deserialize_map(
     type_ident: Ident,
     struct_path: ast::Path,
     impl_generics: &ast::Generics,
-    fields: &[item::Field],
+    fields: &[Field],
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     // Create the field names for the fields.
@@ -1187,14 +1186,14 @@ fn name_expr(
 
 fn check_no_str(
     cx: &ExtCtxt,
-    item: &item::Item,
-) -> Result<(), Error> {
-    let fail = |field: &item::Field| {
+    item: &Item,
+) -> Result<(), ()> {
+    let fail = |field: &Field| {
         cx.span_err(
             field.span,
             "Serde does not support deserializing fields of type &str; \
              consider using String instead");
-        Err(Error)
+        Err(())
     };
 
     for field in item.body.all_fields() {
diff --git a/serde_codegen/src/error.rs b/serde_codegen/src/error.rs
deleted file mode 100644
index 8a76cf30..00000000
--- a/serde_codegen/src/error.rs
+++ /dev/null
@@ -1,2 +0,0 @@
-/// Error returned if failed to parse attribute.
-pub struct Error;
diff --git a/serde_codegen/src/lib.rs b/serde_codegen/src/lib.rs
index 881d9cc2..898f34cd 100644
--- a/serde_codegen/src/lib.rs
+++ b/serde_codegen/src/lib.rs
@@ -7,7 +7,7 @@
 
 extern crate aster;
 extern crate quasi;
-extern crate serde_item as item;
+extern crate serde_internals as internals;
 
 #[cfg(feature = "with-syntex")]
 extern crate syntex;
diff --git a/serde_codegen/src/lib.rs.in b/serde_codegen/src/lib.rs.in
index 0a80f38a..49726851 100644
--- a/serde_codegen/src/lib.rs.in
+++ b/serde_codegen/src/lib.rs.in
@@ -1,4 +1,3 @@
 mod bound;
 mod de;
-mod error;
 mod ser;
diff --git a/serde_codegen/src/ser.rs b/serde_codegen/src/ser.rs
index 403d077c..0d833eb5 100644
--- a/serde_codegen/src/ser.rs
+++ b/serde_codegen/src/ser.rs
@@ -6,7 +6,7 @@ use syntax::ext::base::{Annotatable, ExtCtxt};
 use syntax::ptr::P;
 
 use bound;
-use item::{self, attr};
+use internals::{attr, Body, Error, Field, Item, Style, Variant};
 
 pub fn expand_derive_serialize(
     cx: &mut ExtCtxt,
@@ -25,9 +25,9 @@ pub fn expand_derive_serialize(
         }
     };
 
-    let item = match item::Item::from_ast(cx, item) {
+    let item = match Item::from_ast(cx, item) {
         Ok(item) => item,
-        Err(item::Error::UnexpectedItemKind) => {
+        Err(Error::UnexpectedItemKind) => {
             cx.span_err(item.span,
                 "`#[derive(Serialize)]` may only be applied to structs and enums");
             return;
@@ -43,7 +43,7 @@ pub fn expand_derive_serialize(
 fn serialize_item(
     cx: &ExtCtxt,
     builder: &aster::AstBuilder,
-    item: &item::Item,
+    item: &Item,
 ) -> P<ast::Item> {
     let impl_generics = build_impl_generics(builder, &item);
 
@@ -81,7 +81,7 @@ fn serialize_item(
 // field type that will be serialized by us.
 fn build_impl_generics(
     builder: &aster::AstBuilder,
-    item: &item::Item,
+    item: &Item,
 ) -> ast::Generics {
     let generics = bound::without_defaults(item.generics);
 
@@ -114,12 +114,12 @@ fn needs_serialize_bound(attrs: &attr::Field) -> bool {
 fn serialize_body(
     cx: &ExtCtxt,
     builder: &aster::AstBuilder,
-    item: &item::Item,
+    item: &Item,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
 ) -> P<ast::Expr> {
     match item.body {
-        item::Body::Enum(ref variants) => {
+        Body::Enum(ref variants) => {
             serialize_item_enum(
                 cx,
                 builder,
@@ -129,7 +129,7 @@ fn serialize_body(
                 variants,
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Struct, ref fields) => {
+        Body::Struct(Style::Struct, ref fields) => {
             if fields.iter().any(|field| field.ident.is_none()) {
                 cx.span_bug(item.span, "struct has unnamed fields")
             }
@@ -142,7 +142,7 @@ fn serialize_body(
                 fields,
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Tuple, ref fields) => {
+        Body::Struct(Style::Tuple, ref fields) => {
             if fields.iter().any(|field| field.ident.is_some()) {
                 cx.span_bug(item.span, "tuple struct has named fields")
             }
@@ -155,7 +155,7 @@ fn serialize_body(
                 fields,
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Newtype, ref fields) => {
+        Body::Struct(Style::Newtype, ref fields) => {
             serialize_newtype_struct(
                 cx,
                 builder,
@@ -164,7 +164,7 @@ fn serialize_body(
                 &fields[0],
                 &item.attrs)
         }
-        item::Body::Struct(item::Style::Unit, _) => {
+        Body::Struct(Style::Unit, _) => {
             serialize_unit_struct(
                 cx,
                 builder,
@@ -190,7 +190,7 @@ fn serialize_newtype_struct(
     builder: &aster::AstBuilder,
     impl_generics: &ast::Generics,
     item_ty: P<ast::Ty>,
-    field: &item::Field,
+    field: &Field,
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let type_name = name_expr(builder, item_attrs.name());
@@ -211,7 +211,7 @@ fn serialize_tuple_struct(
     builder: &aster::AstBuilder,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
-    fields: &[item::Field],
+    fields: &[Field],
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let (visitor_struct, visitor_impl) = serialize_tuple_struct_visitor(
@@ -246,7 +246,7 @@ fn serialize_struct(
     builder: &aster::AstBuilder,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
-    fields: &[item::Field],
+    fields: &[Field],
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let (visitor_struct, visitor_impl) = serialize_struct_visitor(
@@ -282,7 +282,7 @@ fn serialize_item_enum(
     type_ident: Ident,
     impl_generics: &ast::Generics,
     ty: P<ast::Ty>,
-    variants: &[item::Variant],
+    variants: &[Variant],
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
     let arms: Vec<_> =
@@ -315,7 +315,7 @@ fn serialize_variant(
     type_ident: Ident,
     generics: &ast::Generics,
     ty: P<ast::Ty>,
-    variant: &item::Variant,
+    variant: &Variant,
     variant_index: usize,
     item_attrs: &attr::Item,
 ) -> ast::Arm {
@@ -325,7 +325,7 @@ fn serialize_variant(
     let variant_name = name_expr(builder, variant.attrs.name());
 
     match variant.style {
-        item::Style::Unit => {
+        Style::Unit => {
             quote_arm!(cx,
                 $type_ident::$variant_ident => {
                     _serde::ser::Serializer::serialize_unit_variant(
@@ -337,7 +337,7 @@ fn serialize_variant(
                 }
             )
         },
-        item::Style::Newtype => {
+        Style::Newtype => {
             let expr = serialize_newtype_variant(
                 cx,
                 builder,
@@ -353,7 +353,7 @@ fn serialize_variant(
                 $type_ident::$variant_ident(ref __simple_value) => { $expr }
             )
         },
-        item::Style::Tuple => {
+        Style::Tuple => {
             let field_names: Vec<ast::Ident> = (0 .. variant.fields.len())
                 .map(|i| builder.id(format!("__field{}", i)))
                 .collect();
@@ -382,7 +382,7 @@ fn serialize_variant(
                 $pat => { $expr }
             )
         }
-        item::Style::Struct => {
+        Style::Struct => {
             let field_names: Vec<_> = (0 .. variant.fields.len())
                 .map(|i| builder.id(format!("__field{}", i)))
                 .collect();
@@ -432,7 +432,7 @@ fn serialize_newtype_variant(
     variant_name: P<ast::Expr>,
     item_ty: P<ast::Ty>,
     generics: &ast::Generics,
-    field: &item::Field,
+    field: &Field,
 ) -> P<ast::Expr> {
     let mut field_expr = quote_expr!(cx, __simple_value);
     if let Some(path) = field.attrs.serialize_with() {
@@ -459,7 +459,7 @@ fn serialize_tuple_variant(
     variant_name: P<ast::Expr>,
     generics: &ast::Generics,
     structure_ty: P<ast::Ty>,
-    fields: &[item::Field],
+    fields: &[Field],
     field_names: Vec<Ident>,
 ) -> P<ast::Expr> {
     let variant_ty = builder.ty().tuple()
@@ -510,7 +510,7 @@ fn serialize_struct_variant(
     variant_name: P<ast::Expr>,
     generics: &ast::Generics,
     ty: P<ast::Ty>,
-    fields: &[item::Field],
+    fields: &[Field],
     field_names: Vec<Ident>,
     item_attrs: &attr::Item,
 ) -> P<ast::Expr> {
@@ -597,7 +597,7 @@ fn serialize_tuple_struct_visitor(
     structure_ty: P<ast::Ty>,
     variant_ty: P<ast::Ty>,
     serializer_method: ast::Ident,
-    fields: &[item::Field],
+    fields: &[Field],
     generics: &ast::Generics,
     is_enum: bool,
 ) -> (P<ast::Item>, P<ast::Item>) {
@@ -678,7 +678,7 @@ fn serialize_struct_visitor(
     structure_ty: P<ast::Ty>,
     variant_ty: P<ast::Ty>,
     serializer_method: ast::Ident,
-    fields: &[item::Field],
+    fields: &[Field],
     generics: &ast::Generics,
     is_enum: bool,
 ) -> (P<ast::Item>, P<ast::Item>) {
diff --git a/serde_item/Cargo.toml b/serde_internals/Cargo.toml
similarity index 92%
rename from serde_item/Cargo.toml
rename to serde_internals/Cargo.toml
index cce2640a..f2864280 100644
--- a/serde_item/Cargo.toml
+++ b/serde_internals/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
-name = "serde_item"
-version = "0.2.0"
+name = "serde_internals"
+version = "0.1.0"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "AST representation used by Serde codegen. Unstable."
diff --git a/serde_item/src/attr.rs b/serde_internals/src/attr.rs
similarity index 100%
rename from serde_item/src/attr.rs
rename to serde_internals/src/attr.rs
diff --git a/serde_item/src/error.rs b/serde_internals/src/error.rs
similarity index 100%
rename from serde_item/src/error.rs
rename to serde_internals/src/error.rs
diff --git a/serde_item/src/lib.rs b/serde_internals/src/lib.rs
similarity index 100%
rename from serde_item/src/lib.rs
rename to serde_internals/src/lib.rs