diff --git a/.circleci/config.yml b/.circleci/config.yml
index 324151f1..68edc5c1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -37,5 +37,6 @@ jobs:
       - run: cargo fmt --all -- --check
       - run: cargo clippy --all
       - run: cargo test --all
+      - run: cargo test --manifest-path tokio-postgres/Cargo.toml --no-default-features
       - run: cargo test --manifest-path tokio-postgres/Cargo.toml --all-features
       - *SAVE_DEPS
diff --git a/tokio-postgres-native-tls/Cargo.toml b/tokio-postgres-native-tls/Cargo.toml
index 9ecfb2c3..6ba2d66e 100644
--- a/tokio-postgres-native-tls/Cargo.toml
+++ b/tokio-postgres-native-tls/Cargo.toml
@@ -9,7 +9,7 @@ futures = "0.1"
 native-tls = "0.2"
 tokio-io = "0.1"
 tokio-tls = "0.2"
-tokio-postgres = { version = "0.3", path = "../tokio-postgres" }
+tokio-postgres = { version = "0.3", path = "../tokio-postgres", default-features = false }
 
 [dev-dependencies]
 tokio = "0.1.7"
diff --git a/tokio-postgres-native-tls/src/test.rs b/tokio-postgres-native-tls/src/test.rs
index 6c2a8ac6..8e21bf0d 100644
--- a/tokio-postgres-native-tls/src/test.rs
+++ b/tokio-postgres-native-tls/src/test.rs
@@ -15,7 +15,7 @@ where
 
     let handshake = TcpStream::connect(&"127.0.0.1:5433".parse().unwrap())
         .map_err(|e| panic!("{}", e))
-        .and_then(|s| builder.connect(s, tls));
+        .and_then(|s| builder.handshake(s, tls));
     let (mut client, connection) = runtime.block_on(handshake).unwrap();
     let connection = connection.map_err(|e| panic!("{}", e));
     runtime.spawn(connection);
diff --git a/tokio-postgres-openssl/Cargo.toml b/tokio-postgres-openssl/Cargo.toml
index 3903050e..c875b118 100644
--- a/tokio-postgres-openssl/Cargo.toml
+++ b/tokio-postgres-openssl/Cargo.toml
@@ -9,7 +9,7 @@ futures = "0.1"
 openssl = "0.10"
 tokio-io = "0.1"
 tokio-openssl = "0.3"
-tokio-postgres = { version = "0.3", path = "../tokio-postgres" }
+tokio-postgres = { version = "0.3", path = "../tokio-postgres", default-features = false }
 
 [dev-dependencies]
 tokio = "0.1.7"
diff --git a/tokio-postgres-openssl/src/test.rs b/tokio-postgres-openssl/src/test.rs
index db58b448..6729916b 100644
--- a/tokio-postgres-openssl/src/test.rs
+++ b/tokio-postgres-openssl/src/test.rs
@@ -15,7 +15,7 @@ where
 
     let handshake = TcpStream::connect(&"127.0.0.1:5433".parse().unwrap())
         .map_err(|e| panic!("{}", e))
-        .and_then(|s| builder.connect(s, tls));
+        .and_then(|s| builder.handshake(s, tls));
     let (mut client, connection) = runtime.block_on(handshake).unwrap();
     let connection = connection.map_err(|e| panic!("{}", e));
     runtime.spawn(connection);
diff --git a/tokio-postgres/Cargo.toml b/tokio-postgres/Cargo.toml
index 0b9eb907..c317c5d6 100644
--- a/tokio-postgres/Cargo.toml
+++ b/tokio-postgres/Cargo.toml
@@ -27,6 +27,9 @@ features = [
 circle-ci = { repository = "sfackler/rust-postgres" }
 
 [features]
+default = ["runtime"]
+runtime = ["tokio-tcp", "tokio-uds"]
+
 "with-bit-vec-0.5" = ["bit-vec-05"]
 "with-chrono-0.4" = ["chrono-04"]
 "with-eui48-0.4" = ["eui48-04"]
@@ -48,6 +51,8 @@ tokio-codec = "0.1"
 tokio-io = "0.1"
 void = "1.0"
 
+tokio-tcp = { version = "0.1", optional = true }
+
 bit-vec-05 = { version = "0.5", package = "bit-vec", optional = true }
 chrono-04 = { version = "0.4", package = "chrono", optional = true }
 eui48-04 = { version = "0.4", package = "eui48", optional = true }
@@ -56,6 +61,9 @@ serde-1 = { version = "1.0", package = "serde", optional = true }
 serde_json-1 = { version = "1.0", package = "serde_json", optional = true }
 uuid-07 = { version = "0.7", package = "uuid", optional = true }
 
+[target.'cfg(unix)'.dependencies]
+tokio-uds = { version = "0.2", optional = true }
+
 [dev-dependencies]
 tokio = "0.1.7"
 env_logger = "0.5"
diff --git a/tokio-postgres/src/builder.rs b/tokio-postgres/src/builder.rs
index f2919c6b..85981e9a 100644
--- a/tokio-postgres/src/builder.rs
+++ b/tokio-postgres/src/builder.rs
@@ -3,8 +3,8 @@ use std::iter;
 use std::str::{self, FromStr};
 use tokio_io::{AsyncRead, AsyncWrite};
 
-use crate::proto::ConnectFuture;
-use crate::{Connect, Error, TlsMode};
+use crate::proto::HandshakeFuture;
+use crate::{Error, Handshake, TlsMode};
 
 #[derive(Clone)]
 pub struct Builder {
@@ -48,12 +48,12 @@ impl Builder {
         Iter(self.params.iter())
     }
 
-    pub fn connect<S, T>(&self, stream: S, tls_mode: T) -> Connect<S, T>
+    pub fn handshake<S, T>(&self, stream: S, tls_mode: T) -> Handshake<S, T>
     where
         S: AsyncRead + AsyncWrite,
         T: TlsMode<S>,
     {
-        Connect(ConnectFuture::new(stream, tls_mode, self.params.clone()))
+        Handshake(HandshakeFuture::new(stream, tls_mode, self.params.clone()))
     }
 }
 
diff --git a/tokio-postgres/src/lib.rs b/tokio-postgres/src/lib.rs
index e1f86ce9..c9d77d1c 100644
--- a/tokio-postgres/src/lib.rs
+++ b/tokio-postgres/src/lib.rs
@@ -10,6 +10,8 @@ pub use crate::builder::*;
 pub use crate::error::*;
 use crate::proto::CancelFuture;
 pub use crate::row::{Row, RowIndex};
+#[cfg(feature = "runtime")]
+pub use crate::socket::Socket;
 pub use crate::stmt::Column;
 pub use crate::tls::*;
 use crate::types::{ToSql, Type};
@@ -18,6 +20,8 @@ mod builder;
 pub mod error;
 mod proto;
 mod row;
+#[cfg(feature = "runtime")]
+mod socket;
 mod stmt;
 mod tls;
 pub mod types;
@@ -156,12 +160,12 @@ where
 }
 
 #[must_use = "futures do nothing unless polled"]
-pub struct Connect<S, T>(proto::ConnectFuture<S, T>)
+pub struct Handshake<S, T>(proto::HandshakeFuture<S, T>)
 where
     S: AsyncRead + AsyncWrite,
     T: TlsMode<S>;
 
-impl<S, T> Future for Connect<S, T>
+impl<S, T> Future for Handshake<S, T>
 where
     S: AsyncRead + AsyncWrite,
     T: TlsMode<S>,
diff --git a/tokio-postgres/src/proto/connect.rs b/tokio-postgres/src/proto/handshake.rs
similarity index 98%
rename from tokio-postgres/src/proto/connect.rs
rename to tokio-postgres/src/proto/handshake.rs
index c2dde72b..3089ffc1 100644
--- a/tokio-postgres/src/proto/connect.rs
+++ b/tokio-postgres/src/proto/handshake.rs
@@ -16,7 +16,7 @@ use crate::proto::{Client, Connection, PostgresCodec, TlsFuture};
 use crate::{CancelData, ChannelBinding, Error, TlsMode};
 
 #[derive(StateMachineFuture)]
-pub enum Connect<S, T>
+pub enum Handshake<S, T>
 where
     S: AsyncRead + AsyncWrite,
     T: TlsMode<S>,
@@ -70,7 +70,7 @@ where
     Failed(Error),
 }
 
-impl<S, T> PollConnect<S, T> for Connect<S, T>
+impl<S, T> PollHandshake<S, T> for Handshake<S, T>
 where
     S: AsyncRead + AsyncWrite,
     T: TlsMode<S>,
@@ -319,12 +319,12 @@ where
     }
 }
 
-impl<S, T> ConnectFuture<S, T>
+impl<S, T> HandshakeFuture<S, T>
 where
     S: AsyncRead + AsyncWrite,
     T: TlsMode<S>,
 {
-    pub fn new(stream: S, tls_mode: T, params: HashMap<String, String>) -> ConnectFuture<S, T> {
-        Connect::start(TlsFuture::new(stream, tls_mode), params)
+    pub fn new(stream: S, tls_mode: T, params: HashMap<String, String>) -> HandshakeFuture<S, T> {
+        Handshake::start(TlsFuture::new(stream, tls_mode), params)
     }
 }
diff --git a/tokio-postgres/src/proto/mod.rs b/tokio-postgres/src/proto/mod.rs
index b1c82cb3..9d19fa0e 100644
--- a/tokio-postgres/src/proto/mod.rs
+++ b/tokio-postgres/src/proto/mod.rs
@@ -22,11 +22,11 @@ mod bind;
 mod cancel;
 mod client;
 mod codec;
-mod connect;
 mod connection;
 mod copy_in;
 mod copy_out;
 mod execute;
+mod handshake;
 mod portal;
 mod prepare;
 mod query;
@@ -42,11 +42,11 @@ pub use crate::proto::bind::BindFuture;
 pub use crate::proto::cancel::CancelFuture;
 pub use crate::proto::client::Client;
 pub use crate::proto::codec::PostgresCodec;
-pub use crate::proto::connect::ConnectFuture;
 pub use crate::proto::connection::Connection;
 pub use crate::proto::copy_in::CopyInFuture;
 pub use crate::proto::copy_out::CopyOutStream;
 pub use crate::proto::execute::ExecuteFuture;
+pub use crate::proto::handshake::HandshakeFuture;
 pub use crate::proto::portal::Portal;
 pub use crate::proto::prepare::PrepareFuture;
 pub use crate::proto::query::QueryStream;
diff --git a/tokio-postgres/src/socket.rs b/tokio-postgres/src/socket.rs
new file mode 100644
index 00000000..32d30b24
--- /dev/null
+++ b/tokio-postgres/src/socket.rs
@@ -0,0 +1,96 @@
+use bytes::{Buf, BufMut};
+use futures::Poll;
+use std::io::{self, Read, Write};
+use tokio_io::{AsyncRead, AsyncWrite};
+use tokio_tcp::TcpStream;
+#[cfg(unix)]
+use tokio_uds::UnixStream;
+
+enum Inner {
+    Tcp(TcpStream),
+    #[cfg(unix)]
+    Unix(UnixStream),
+}
+
+pub struct Socket(Inner);
+
+impl Socket {
+    pub(crate) fn new_tcp(stream: TcpStream) -> Socket {
+        Socket(Inner::Tcp(stream))
+    }
+
+    #[cfg(unix)]
+    pub(crate) fn new_unix(stream: UnixStream) -> Socket {
+        Socket(Inner::Unix(stream))
+    }
+}
+
+impl Read for Socket {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        match &mut self.0 {
+            Inner::Tcp(s) => s.read(buf),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.read(buf),
+        }
+    }
+}
+
+impl AsyncRead for Socket {
+    unsafe fn prepare_uninitialized_buffer(&self, buf: &mut [u8]) -> bool {
+        match &self.0 {
+            Inner::Tcp(s) => s.prepare_uninitialized_buffer(buf),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.prepare_uninitialized_buffer(buf),
+        }
+    }
+
+    fn read_buf<B>(&mut self, buf: &mut B) -> Poll<usize, io::Error>
+    where
+        B: BufMut,
+    {
+        match &mut self.0 {
+            Inner::Tcp(s) => s.read_buf(buf),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.read_buf(buf),
+        }
+    }
+}
+
+impl Write for Socket {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        match &mut self.0 {
+            Inner::Tcp(s) => s.write(buf),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.write(buf),
+        }
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        match &mut self.0 {
+            Inner::Tcp(s) => s.flush(),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.flush(),
+        }
+    }
+}
+
+impl AsyncWrite for Socket {
+    fn shutdown(&mut self) -> Poll<(), io::Error> {
+        match &mut self.0 {
+            Inner::Tcp(s) => s.shutdown(),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.shutdown(),
+        }
+    }
+
+    fn write_buf<B>(&mut self, buf: &mut B) -> Poll<usize, io::Error>
+    where
+        B: Buf,
+    {
+        match &mut self.0 {
+            Inner::Tcp(s) => s.write_buf(buf),
+            #[cfg(unix)]
+            Inner::Unix(s) => s.write_buf(buf),
+        }
+    }
+}
diff --git a/tokio-postgres/tests/test/main.rs b/tokio-postgres/tests/test/main.rs
index 15e39137..ad1736f0 100644
--- a/tokio-postgres/tests/test/main.rs
+++ b/tokio-postgres/tests/test/main.rs
@@ -22,7 +22,7 @@ fn connect(
     let builder = s.parse::<tokio_postgres::Builder>().unwrap();
     TcpStream::connect(&"127.0.0.1:5433".parse().unwrap())
         .map_err(|e| panic!("{}", e))
-        .and_then(move |s| builder.connect(s, NoTls))
+        .and_then(move |s| builder.handshake(s, NoTls))
 }
 
 fn smoke_test(s: &str) {