diff --git a/src/azure_hl.rs b/src/azure_hl.rs
index 8e8517e..f0441a4 100644
--- a/src/azure_hl.rs
+++ b/src/azure_hl.rs
@@ -42,7 +42,7 @@ use azure::{AzFilterNodeSetSourceSurfaceInput, AzReleaseFilterNode, AzDrawTarget
 use azure::{AzFilterNodeSetColorAttribute, AzFilterNodeSetFloatAttribute};
 use azure::{AzFilterNodeSetFilterNodeInput, AzDrawTargetDrawFilter, AzFilterNodeRef, AzFilterType};
 
-use sync::Arc;
+use std::sync::Arc;
 use geom::matrix2d::Matrix2D;
 use geom::point::Point2D;
 use geom::rect::Rect;
@@ -95,7 +95,7 @@ impl AsAzurePoint for Point2D<AzFloat> {
     }
 }
 
-#[deriving(Clone)]
+#[deriving(Copy, Clone)]
 pub struct Color {
     pub r: AzFloat,
     pub g: AzFloat,
@@ -273,6 +273,7 @@ impl SurfaceFormat {
     }
 }
 
+#[deriving(Copy)]
 pub enum Filter {
     Good,
     Linear,
diff --git a/src/lib.rs b/src/lib.rs
index 367fe6a..a5702d3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,6 @@
 #![feature(globs)]
 
 extern crate libc;
-extern crate sync;
 extern crate geom;
 extern crate layers;
 #[cfg(target_os = "linux")]