diff --git a/ipc/codegen/build.rs b/ipc/codegen/build.rs
index db9f5ac7e..82f990188 100644
--- a/ipc/codegen/build.rs
+++ b/ipc/codegen/build.rs
@@ -17,29 +17,29 @@
 
 #[cfg(feature = "with-syntex")]
 mod inner {
-    extern crate syntex;
-    extern crate quasi_codegen;
+	extern crate syntex;
+	extern crate quasi_codegen;
 
-    use std::env;
-    use std::path::Path;
+	use std::env;
+	use std::path::Path;
 
-    pub fn main() {
-        let out_dir = env::var_os("OUT_DIR").unwrap();
-        let mut registry = syntex::Registry::new();
-        quasi_codegen::register(&mut registry);
+	pub fn main() {
+		let out_dir = env::var_os("OUT_DIR").unwrap();
+		let mut registry = syntex::Registry::new();
+		quasi_codegen::register(&mut registry);
 
-        let src = Path::new("src/lib.rs.in");
-        let dst = Path::new(&out_dir).join("lib.rs");
+		let src = Path::new("src/lib.rs.in");
+		let dst = Path::new(&out_dir).join("lib.rs");
 
-        registry.expand("", &src, &dst).unwrap();
-    }
+		registry.expand("", &src, &dst).unwrap();
+	}
 }
 
 #[cfg(not(feature = "with-syntex"))]
 mod inner {
-    pub fn main() {}
+	pub fn main() {}
 }
 
 fn main() {
-    inner::main();
+	inner::main();
 }
diff --git a/ipc/codegen/src/codegen.rs b/ipc/codegen/src/codegen.rs
index 922fefb7b..56e0ae01a 100644
--- a/ipc/codegen/src/codegen.rs
+++ b/ipc/codegen/src/codegen.rs
@@ -42,22 +42,22 @@ pub fn expand_ipc_implementation(
     annotatable: &Annotatable,
     push: &mut FnMut(Annotatable)
 ) {
-    let item = match *annotatable {
-        Annotatable::Item(ref item) => item,
-        _ => {
-            cx.span_err(meta_item.span, "`#[derive(Ipc)]` may only be applied to struct implementations");
-            return;
-        }
-    };
+	let item = match *annotatable {
+		Annotatable::Item(ref item) => item,
+		_ => {
+			cx.span_err(meta_item.span, "`#[derive(Ipc)]` may only be applied to struct implementations");
+			return;
+		}
+	};
 
-    let builder = aster::AstBuilder::new().span(span);
+	let builder = aster::AstBuilder::new().span(span);
 
-    let impl_item = match implement_interface(cx, &builder, &item, push) {
-        Ok(item) => item,
-        Err(Error) => { return; }
-    };
+	let impl_item = match implement_interface(cx, &builder, &item, push) {
+		Ok(item) => item,
+		Err(Error) => { return; }
+	};
 
-    push(Annotatable::Item(impl_item))
+	push(Annotatable::Item(impl_item))
 }
 
 fn field_name(builder: &aster::AstBuilder, arg: &Arg) -> ast::Ident {
diff --git a/ipc/codegen/src/lib.rs b/ipc/codegen/src/lib.rs
index 8129842ba..44ac093d9 100644
--- a/ipc/codegen/src/lib.rs
+++ b/ipc/codegen/src/lib.rs
@@ -52,16 +52,16 @@ include!("lib.rs.in");
 
 #[cfg(feature = "with-syntex")]
 pub fn register(reg: &mut syntex::Registry) {
-    reg.add_attr("feature(custom_derive)");
-    reg.add_attr("feature(custom_attribute)");
+	reg.add_attr("feature(custom_derive)");
+	reg.add_attr("feature(custom_attribute)");
 
-    reg.add_decorator("derive_Ipc", codegen::expand_ipc_implementation);
+	reg.add_decorator("derive_Ipc", codegen::expand_ipc_implementation);
 }
 
 #[cfg(not(feature = "with-syntex"))]
 pub fn register(reg: &mut rustc_plugin::Registry) {
-    reg.register_syntax_extension(
-        syntax::parse::token::intern("derive_Ipc"),
-        syntax::ext::base::MultiDecorator(
-            Box::new(ser::expand_derive_serialize)));
+	reg.register_syntax_extension(
+		syntax::parse::token::intern("derive_Ipc"),
+		syntax::ext::base::MultiDecorator(
+			Box::new(ser::expand_derive_serialize)));
 }