diff --git a/postgres/src/tls/native_tls.rs b/postgres/src/tls/native_tls.rs
index fb48858c..f0b1d80b 100644
--- a/postgres/src/tls/native_tls.rs
+++ b/postgres/src/tls/native_tls.rs
@@ -1,5 +1,5 @@
 //! Native TLS support.
-extern crate native_tls;
+pub extern crate native_tls;
 
 use std::error::Error;
 use std::fmt;
diff --git a/postgres/src/tls/openssl.rs b/postgres/src/tls/openssl.rs
index 3ca3e50f..3db6f01e 100644
--- a/postgres/src/tls/openssl.rs
+++ b/postgres/src/tls/openssl.rs
@@ -1,5 +1,5 @@
 //! OpenSSL support.
-extern crate openssl;
+pub extern crate openssl;
 
 use std::error::Error;
 use std::fmt;
diff --git a/postgres/src/tls/schannel.rs b/postgres/src/tls/schannel.rs
index 04fadef4..9f729448 100644
--- a/postgres/src/tls/schannel.rs
+++ b/postgres/src/tls/schannel.rs
@@ -1,6 +1,6 @@
 //! SChannel support.
 
-extern crate schannel;
+pub extern crate schannel;
 
 use std::error::Error;
 use std::fmt;
diff --git a/postgres/src/tls/security_framework.rs b/postgres/src/tls/security_framework.rs
index cd778452..d0696adb 100644
--- a/postgres/src/tls/security_framework.rs
+++ b/postgres/src/tls/security_framework.rs
@@ -1,5 +1,5 @@
 //! Security Framework support.
-extern crate security_framework;
+pub extern crate security_framework;
 
 use self::security_framework::secure_transport::{SslStream, ClientBuilder};
 use tls::{Stream, TlsStream, TlsHandshake};