diff --git a/openssl-sys/src/lib.rs b/openssl-sys/src/lib.rs
index 1faf749e..8550ce33 100644
--- a/openssl-sys/src/lib.rs
+++ b/openssl-sys/src/lib.rs
@@ -39,6 +39,7 @@ pub type X509_NAME_ENTRY = c_void;
 pub type X509_REQ = c_void;
 pub type X509_STORE_CTX = c_void;
 
+#[allow(missing_copy_implementations)]
 #[repr(C)]
 pub struct EVP_MD_CTX {
     digest: *mut EVP_MD,
@@ -49,6 +50,7 @@ pub struct EVP_MD_CTX {
     update: *mut c_void
 }
 
+#[allow(missing_copy_implementations)]
 #[repr(C)]
 pub struct HMAC_CTX {
     md: *mut EVP_MD,
@@ -59,6 +61,7 @@ pub struct HMAC_CTX {
     key: [c_uchar, ..128]
 }
 
+#[allow(missing_copy_implementations)]
 #[repr(C)]
 pub struct X509V3_CTX {
     flags: c_int,
@@ -72,6 +75,7 @@ pub struct X509V3_CTX {
     // Maybe more here
 }
 
+#[allow(missing_copy_implementations)]
 #[repr(C)]
 pub struct BIGNUM {
     pub d: *mut c_void,
diff --git a/src/bn/mod.rs b/src/bn/mod.rs
index 2536f8a5..069c6b22 100644
--- a/src/bn/mod.rs
+++ b/src/bn/mod.rs
@@ -7,6 +7,7 @@ use ssl::error::SslError;
 
 pub struct BigNum(*mut ffi::BIGNUM);
 
+#[deriving(Copy)]
 #[repr(C)]
 pub enum RNGProperty {
     MsbMaybeZero = -1,
diff --git a/src/crypto/hash.rs b/src/crypto/hash.rs
index b5d0eab5..37573368 100644
--- a/src/crypto/hash.rs
+++ b/src/crypto/hash.rs
@@ -4,6 +4,7 @@ use std::io;
 
 use ffi;
 
+#[deriving(Copy)]
 pub enum HashType {
     MD5,
     SHA1,
diff --git a/src/crypto/pkey.rs b/src/crypto/pkey.rs
index 146d2aa3..bab7addc 100644
--- a/src/crypto/pkey.rs
+++ b/src/crypto/pkey.rs
@@ -6,7 +6,7 @@ use crypto::hash::HashType;
 use ffi;
 use ssl::error::{SslError, StreamError};
 
-
+#[deriving(Copy)]
 enum Parts {
     Neither,
     Public,
@@ -14,6 +14,7 @@ enum Parts {
 }
 
 /// Represents a role an asymmetric key might be appropriate for.
+#[deriving(Copy)]
 pub enum Role {
     Encrypt,
     Decrypt,
@@ -22,6 +23,7 @@ pub enum Role {
 }
 
 /// Type of encryption padding to use.
+#[deriving(Copy)]
 pub enum EncryptionPadding {
     OAEP,
     PKCS1v15
diff --git a/src/crypto/symm.rs b/src/crypto/symm.rs
index 998d351c..61365f2e 100644
--- a/src/crypto/symm.rs
+++ b/src/crypto/symm.rs
@@ -2,12 +2,14 @@ use libc::{c_int};
 
 use ffi;
 
+#[deriving(Copy)]
 pub enum Mode {
     Encrypt,
     Decrypt,
 }
 
 #[allow(non_camel_case_types)]
+#[deriving(Copy)]
 pub enum Type {
     AES_128_ECB,
     AES_128_CBC,
diff --git a/src/ssl/mod.rs b/src/ssl/mod.rs
index 6112bc8d..5aa60666 100644
--- a/src/ssl/mod.rs
+++ b/src/ssl/mod.rs
@@ -33,6 +33,7 @@ fn init() {
 /// Determines the SSL method supported
 #[deriving(Show, Hash, PartialEq, Eq)]
 #[allow(non_camel_case_types)]
+#[deriving(Copy)]
 pub enum SslMethod {
     #[cfg(feature = "sslv2")]
     /// Only support the SSLv2 protocol, requires `feature="sslv2"`
@@ -68,6 +69,7 @@ impl SslMethod {
 }
 
 /// Determines the type of certificate verification used
+#[deriving(Copy)]
 #[repr(i32)]
 pub enum SslVerifyMode {
     /// Verify that the server's certificate is trusted
diff --git a/src/x509/mod.rs b/src/x509/mod.rs
index a06fe4e1..47294c3d 100644
--- a/src/x509/mod.rs
+++ b/src/x509/mod.rs
@@ -15,6 +15,7 @@ use ssl::error::{SslError, StreamError};
 #[cfg(test)]
 mod tests;
 
+#[deriving(Copy)]
 #[repr(i32)]
 pub enum X509FileType {
     PEM = ffi::X509_FILETYPE_PEM,
@@ -22,6 +23,7 @@ pub enum X509FileType {
     Default = ffi::X509_FILETYPE_DEFAULT
 }
 
+#[allow(missing_copy_implementations)]
 pub struct X509StoreContext {
     ctx: *mut ffi::X509_STORE_CTX
 }
@@ -54,7 +56,7 @@ trait AsStr<'a> {
     fn as_str(&self) -> &'a str;
 }
 
-#[deriving(Clone)]
+#[deriving(Clone, Copy)]
 pub enum KeyUsage {
     DigitalSignature,
     NonRepudiation,
@@ -84,7 +86,7 @@ impl AsStr<'static> for KeyUsage {
 }
 
 
-#[deriving(Clone)]
+#[deriving(Clone, Copy)]
 pub enum ExtKeyUsage {
     ServerAuth,
     ClientAuth,
@@ -430,6 +432,7 @@ pub struct X509Name<'x> {
 
 macro_rules! make_validation_error(
     ($ok_val:ident, $($name:ident = $val:ident,)+) => (
+        #[deriving(Copy)]
         pub enum X509ValidationError {
             $($name,)+
             X509UnknownError(c_int)