diff --git a/openssl/src/asn1.rs b/openssl/src/asn1.rs
index 27913aa6f24a023c19dc86c8640493bfd4e54054..d129235ae633dad11fe990b6359de76ead0b6fc9 100644
--- a/openssl/src/asn1.rs
+++ b/openssl/src/asn1.rs
@@ -38,7 +38,7 @@ use error::ErrorStack;
 use nid::Nid;
 use string::OpensslString;
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::ASN1_GENERALIZEDTIME;
     fn drop = ffi::ASN1_GENERALIZEDTIME_free;
 
@@ -73,7 +73,7 @@ impl fmt::Display for Asn1GeneralizedTimeRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::ASN1_TIME;
     fn drop = ffi::ASN1_TIME_free;
     /// Time storage and comparison
@@ -119,7 +119,7 @@ impl Asn1Time {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::ASN1_STRING;
     fn drop = ffi::ASN1_STRING_free;
     /// Primary ASN.1 type used by OpenSSL
@@ -170,7 +170,7 @@ impl Asn1StringRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::ASN1_INTEGER;
     fn drop = ffi::ASN1_INTEGER_free;
 
@@ -211,7 +211,7 @@ impl Asn1IntegerRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::ASN1_BIT_STRING;
     fn drop = ffi::ASN1_BIT_STRING_free;
     /// Sequence of bytes
@@ -238,7 +238,7 @@ impl Asn1BitStringRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::ASN1_OBJECT;
     fn drop = ffi::ASN1_OBJECT_free;
 
diff --git a/openssl/src/bn.rs b/openssl/src/bn.rs
index 7743228b9b13e232c7f23a52bac0d15e38a71987..fc6e0bb852272bc575664f28bfc7769d12dbb507 100644
--- a/openssl/src/bn.rs
+++ b/openssl/src/bn.rs
@@ -67,7 +67,7 @@ pub const MSB_ONE: MsbOption = MsbOption(0);
 /// of bits in the original numbers.
 pub const TWO_MSB_ONE: MsbOption = MsbOption(1);
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::BN_CTX;
     fn drop = ffi::BN_CTX_free;
 
@@ -99,7 +99,7 @@ impl BigNumContext {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::BIGNUM;
     fn drop = ffi::BN_free;
 
diff --git a/openssl/src/cms.rs b/openssl/src/cms.rs
index 59866df1fba8f5638be96c84f5d620d9ccbe88e0..160d2daf355279080e0b861bae01af7af7fa8417 100644
--- a/openssl/src/cms.rs
+++ b/openssl/src/cms.rs
@@ -18,7 +18,7 @@ use pkey::PKeyRef;
 use cvt;
 use cvt_p;
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::CMS_ContentInfo;
     fn drop = ffi::CMS_ContentInfo_free;
 
diff --git a/openssl/src/conf.rs b/openssl/src/conf.rs
index 56654ecbcc9bcc7b5506ebac23f44a4498516eaf..fb5d4f3c0570306598ec549b16a8ed545cad609a 100644
--- a/openssl/src/conf.rs
+++ b/openssl/src/conf.rs
@@ -28,7 +28,7 @@ impl ConfMethod {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::CONF;
     fn drop = ffi::NCONF_free;
 
diff --git a/openssl/src/dh.rs b/openssl/src/dh.rs
index 2d6583a20b8a9c6c7633e7f85eb3ae7ac9ccc7bc..50d9da7b2fca3af71e26e551f681e736e13d4a8d 100644
--- a/openssl/src/dh.rs
+++ b/openssl/src/dh.rs
@@ -7,7 +7,7 @@ use std::ptr;
 use {cvt, cvt_p};
 use bn::BigNum;
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::DH;
     fn drop = ffi::DH_free;
 
diff --git a/openssl/src/dsa.rs b/openssl/src/dsa.rs
index aaada1291dd1479d68be39b010d209bb2c268ade..c687531e9309003d2744433aea8fe0f041510871 100644
--- a/openssl/src/dsa.rs
+++ b/openssl/src/dsa.rs
@@ -17,7 +17,7 @@ use bn::BigNumRef;
 use error::ErrorStack;
 use util::{CallbackState, invoke_passwd_cb_old};
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::DSA;
     fn drop = ffi::DSA_free;
 
diff --git a/openssl/src/ec.rs b/openssl/src/ec.rs
index ddf8c0290c7bc3f860ccea84a856e8997264ed2e..97b095d093bb645fd6700e7b4991795830709507 100644
--- a/openssl/src/ec.rs
+++ b/openssl/src/ec.rs
@@ -98,7 +98,7 @@ pub struct PointConversionForm(ffi::point_conversion_form_t);
 #[derive(Copy, Clone)]
 pub struct Asn1Flag(c_int);
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::EC_GROUP;
     fn drop = ffi::EC_GROUP_free;
 
@@ -233,7 +233,7 @@ impl EcGroupRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::EC_POINT;
     fn drop = ffi::EC_POINT_free;
 
@@ -498,7 +498,7 @@ impl EcPoint {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::EC_KEY;
     fn drop = ffi::EC_KEY_free;
 
@@ -646,7 +646,7 @@ impl EcKey {
 }
 
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::EC_KEY;
     fn drop = ffi::EC_KEY_free;
 
diff --git a/openssl/src/lib.rs b/openssl/src/lib.rs
index a6b7885c890e37fe2b92076f764fad06f56ff3ff..5c3e7cc884e7b22939bd1f3abde23391dcdfb3df 100644
--- a/openssl/src/lib.rs
+++ b/openssl/src/lib.rs
@@ -27,6 +27,7 @@ use error::ErrorStack;
 mod macros;
 
 mod bio;
+#[macro_use]
 mod util;
 pub mod aes;
 pub mod asn1;
diff --git a/openssl/src/macros.rs b/openssl/src/macros.rs
index b2fe0c18a9e4715ae906b13fb934f5279c7de485..721f4b0c44f51624ce2426e98d4a12f1c22836bb 100644
--- a/openssl/src/macros.rs
+++ b/openssl/src/macros.rs
@@ -214,3 +214,35 @@ macro_rules! from_pem {
             from_pem, $t, $f);
     }
 }
+
+
+macro_rules! foreign_type_and_impl_send_sync {
+    (
+        $(#[$impl_attr:meta])*
+        type CType = $ctype:ty;
+        fn drop = $drop:expr;
+        $(fn clone = $clone:expr;)*
+
+        $(#[$owned_attr:meta])*
+        pub struct $owned:ident;
+        $(#[$borrowed_attr:meta])*
+        pub struct $borrowed:ident;
+    )
+        => {
+            foreign_type! {
+                $(#[$impl_attr])*
+                type CType = $ctype;
+                fn drop = $drop;
+                $(fn clone = $clone;)*
+                $(#[$owned_attr])*
+                pub struct $owned;
+                $(#[$borrowed_attr])*
+                pub struct $borrowed;
+            }
+
+            unsafe impl Send for $owned{}
+            unsafe impl Send for $borrowed{}
+            unsafe impl Sync for $owned{}
+            unsafe impl Sync for $borrowed{}
+        };
+}
diff --git a/openssl/src/ocsp.rs b/openssl/src/ocsp.rs
index 1968bcf6d3b8fc502416cac5125accf0864207ab..65436a4c4081a98c96cd255625a9fb12eb43d396 100644
--- a/openssl/src/ocsp.rs
+++ b/openssl/src/ocsp.rs
@@ -136,7 +136,7 @@ impl<'a> Status<'a> {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::OCSP_BASICRESP;
     fn drop = ffi::OCSP_BASICRESP_free;
 
@@ -203,7 +203,7 @@ impl OcspBasicResponseRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::OCSP_CERTID;
     fn drop = ffi::OCSP_CERTID_free;
 
@@ -228,7 +228,7 @@ impl OcspCertId {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::OCSP_RESPONSE;
     fn drop = ffi::OCSP_RESPONSE_free;
 
@@ -273,7 +273,7 @@ impl OcspResponseRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::OCSP_REQUEST;
     fn drop = ffi::OCSP_REQUEST_free;
 
@@ -305,7 +305,7 @@ impl OcspRequestRef {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::OCSP_ONEREQ;
     fn drop = ffi::OCSP_ONEREQ_free;
 
diff --git a/openssl/src/pkcs12.rs b/openssl/src/pkcs12.rs
index 6e42f73be9e20ddfdda36651df8577edc87adcf6..86111280c6180066d459b3462e4609eeab9a6f44 100644
--- a/openssl/src/pkcs12.rs
+++ b/openssl/src/pkcs12.rs
@@ -13,7 +13,7 @@ use x509::X509;
 use stack::Stack;
 use nid;
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::PKCS12;
     fn drop = ffi::PKCS12_free;
 
diff --git a/openssl/src/pkey.rs b/openssl/src/pkey.rs
index f4e36892c7822c865092316db07133a4b491839d..9ef7e8854a35077e8c08c009f35b011029ef3e9a 100644
--- a/openssl/src/pkey.rs
+++ b/openssl/src/pkey.rs
@@ -14,7 +14,7 @@ use rsa::{Rsa, Padding};
 use error::ErrorStack;
 use util::{CallbackState, invoke_passwd_cb, invoke_passwd_cb_old};
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::EVP_PKEY;
     fn drop = ffi::EVP_PKEY_free;
 
@@ -75,9 +75,6 @@ impl PKeyRef {
     }
 }
 
-unsafe impl Send for PKey {}
-unsafe impl Sync for PKey {}
-
 impl PKey {
     /// Creates a new `PKey` containing an RSA key.
     pub fn from_rsa(rsa: Rsa) -> Result<PKey, ErrorStack> {
@@ -226,7 +223,7 @@ impl PKey {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::EVP_PKEY_CTX;
     fn drop = ffi::EVP_PKEY_CTX_free;
 
@@ -234,9 +231,6 @@ foreign_type! {
     pub struct PKeyCtxRef;
 }
 
-unsafe impl Send for PKeyCtx {}
-unsafe impl Sync for PKeyCtx {}
-
 impl PKeyCtx {
     pub fn from_pkey(pkey: &PKeyRef) -> Result<PKeyCtx, ErrorStack> {
         unsafe {
diff --git a/openssl/src/rsa.rs b/openssl/src/rsa.rs
index d3d118eddce7ac639488a0ef434a306faa99fbcc..3f4e80147540c749446dc5552edf9400518ad345 100644
--- a/openssl/src/rsa.rs
+++ b/openssl/src/rsa.rs
@@ -29,7 +29,7 @@ pub const NO_PADDING: Padding = Padding(ffi::RSA_NO_PADDING);
 pub const PKCS1_PADDING: Padding = Padding(ffi::RSA_PKCS1_PADDING);
 pub const PKCS1_OAEP_PADDING: Padding = Padding(ffi::RSA_PKCS1_OAEP_PADDING);
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::RSA;
     fn drop = ffi::RSA_free;
 
diff --git a/openssl/src/string.rs b/openssl/src/string.rs
index 0324d57760a7052df1eb95ba2f24b2ec1770ec6f..af58130e048038cb02b9543ee54948f856b8f200 100644
--- a/openssl/src/string.rs
+++ b/openssl/src/string.rs
@@ -8,7 +8,7 @@ use std::str;
 
 use stack::Stackable;
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = c_char;
     fn drop = free;
 
diff --git a/openssl/src/verify.rs b/openssl/src/verify.rs
index 7b2fa612e8068ac64ac26a26ee93964c43e58877..65315e473ae76c601d452b041e053f1e8161ba31 100644
--- a/openssl/src/verify.rs
+++ b/openssl/src/verify.rs
@@ -20,7 +20,7 @@ bitflags! {
     }
 }
 
-foreign_type! {
+foreign_type_and_impl_send_sync! {
     type CType = ffi::X509_VERIFY_PARAM;
     fn drop = ffi::X509_VERIFY_PARAM_free;