diff --git a/src/array.rs b/src/array.rs
index 831f8c7..2fdee58 100644
--- a/src/array.rs
+++ b/src/array.rs
@@ -29,6 +29,7 @@ pub type CFArrayEqualCallBack = *const u8;
 
 #[allow(dead_code)]
 #[repr(C)]
+#[deriving(Copy)]
 pub struct CFArrayCallBacks {
     version: CFIndex,
     retain: CFArrayRetainCallBack,
diff --git a/src/base.rs b/src/base.rs
index ecd1e79..bcd2df1 100644
--- a/src/base.rs
+++ b/src/base.rs
@@ -8,7 +8,7 @@
 // except according to those terms.
 
 use libc::{c_long, c_ulong};
-use std::num::Bounded;
+use std::num::Int;
 
 pub type Boolean = u8;
 
@@ -23,7 +23,7 @@ pub trait CFIndexConvertible {
 impl CFIndexConvertible for uint {
     #[inline]
     fn to_CFIndex(self) -> CFIndex {
-        let max_CFIndex: CFIndex = Bounded::max_value();
+        let max_CFIndex: CFIndex = Int::max_value();
         if self > (max_CFIndex as uint) {
             panic!("value out of range")
         }
@@ -35,6 +35,7 @@ pub type CFOptionFlags = u32;
 
 #[allow(dead_code)]
 #[repr(C)]
+#[deriving(Copy)]
 pub struct CFRange {
     location: CFIndex,
     length: CFIndex
diff --git a/src/dictionary.rs b/src/dictionary.rs
index 5b17bdf..2d8200b 100644
--- a/src/dictionary.rs
+++ b/src/dictionary.rs
@@ -26,6 +26,7 @@ pub type CFDictionaryRetainCallBack = *const u8;
 
 #[allow(dead_code)]
 #[repr(C)]
+#[deriving(Copy)]
 pub struct CFDictionaryKeyCallBacks {
     version: CFIndex,
     retain: CFDictionaryRetainCallBack,
@@ -37,6 +38,7 @@ pub struct CFDictionaryKeyCallBacks {
 
 #[allow(dead_code)]
 #[repr(C)]
+#[deriving(Copy)]
 pub struct CFDictionaryValueCallBacks {
     version: CFIndex,
     retain: CFDictionaryRetainCallBack,
diff --git a/src/set.rs b/src/set.rs
index d053277..4c32881 100644
--- a/src/set.rs
+++ b/src/set.rs
@@ -23,6 +23,7 @@ pub type CFSetHashCallBack = *const u8;
 
 #[allow(dead_code)]
 #[repr(C)]
+#[deriving(Copy)]
 pub struct CFSetCallBacks {
     version: CFIndex,
     retain: CFSetRetainCallBack,
@@ -108,7 +109,7 @@ extern {
     static kCFTypeSetCallBacks: CFSetCallBacks;
 
     /* Creating Sets */
-    fn CFSetCreate(allocator: CFAllocatorRef, values: *const *const c_void, numValues: CFIndex, 
+    fn CFSetCreate(allocator: CFAllocatorRef, values: *const *const c_void, numValues: CFIndex,
                    callBacks: *const CFSetCallBacks) -> CFSetRef;
 
     /* Applying a Function to Set Members */