diff --git a/src/net/tcp/listener.rs b/src/net/tcp/listener.rs
index dc0b917..fc99d9f 100644
--- a/src/net/tcp/listener.rs
+++ b/src/net/tcp/listener.rs
@@ -204,6 +204,11 @@ impl<'a> Stream for Incoming<'a> {
 impl From<std::net::TcpListener> for TcpListener {
     /// Converts a `std::net::TcpListener` into its asynchronous equivalent.
     fn from(listener: std::net::TcpListener) -> TcpListener {
+        // Make sure we are in nonblocking mode.
+        listener
+            .set_nonblocking(true)
+            .expect("failed to set nonblocking mode");
+
         let mio_listener = mio::net::TcpListener::from_std(listener);
         TcpListener {
             watcher: Watcher::new(mio_listener),
diff --git a/src/net/tcp/stream.rs b/src/net/tcp/stream.rs
index e1bb067..7952964 100644
--- a/src/net/tcp/stream.rs
+++ b/src/net/tcp/stream.rs
@@ -370,6 +370,11 @@ impl Write for &TcpStream {
 impl From<std::net::TcpStream> for TcpStream {
     /// Converts a `std::net::TcpStream` into its asynchronous equivalent.
     fn from(stream: std::net::TcpStream) -> TcpStream {
+        // Make sure we are in nonblocking mode.
+        stream
+            .set_nonblocking(true)
+            .expect("failed to set nonblocking mode");
+
         let mio_stream = mio::net::TcpStream::from_std(stream);
         TcpStream {
             watcher: Arc::new(Watcher::new(mio_stream)),
diff --git a/src/net/udp/mod.rs b/src/net/udp/mod.rs
index b1a7025..4698b45 100644
--- a/src/net/udp/mod.rs
+++ b/src/net/udp/mod.rs
@@ -496,6 +496,11 @@ impl UdpSocket {
 impl From<std::net::UdpSocket> for UdpSocket {
     /// Converts a `std::net::UdpSocket` into its asynchronous equivalent.
     fn from(socket: std::net::UdpSocket) -> UdpSocket {
+        // Make sure we are in nonblocking mode.
+        socket
+            .set_nonblocking(true)
+            .expect("failed to set nonblocking mode");
+
         let mio_socket = mio::net::UdpSocket::from_std(socket);
         UdpSocket {
             watcher: Watcher::new(mio_socket),
diff --git a/src/os/unix/net/datagram.rs b/src/os/unix/net/datagram.rs
index 20b1046..c7c9403 100644
--- a/src/os/unix/net/datagram.rs
+++ b/src/os/unix/net/datagram.rs
@@ -313,6 +313,11 @@ impl fmt::Debug for UnixDatagram {
 impl From<std::os::unix::net::UnixDatagram> for UnixDatagram {
     /// Converts a `std::os::unix::net::UnixDatagram` into its asynchronous equivalent.
     fn from(datagram: std::os::unix::net::UnixDatagram) -> UnixDatagram {
+        // Make sure we are in nonblocking mode.
+        datagram
+            .set_nonblocking(true)
+            .expect("failed to set nonblocking mode");
+
         let mio_datagram = mio::net::UnixDatagram::from_std(datagram);
         UnixDatagram {
             watcher: Watcher::new(mio_datagram),
diff --git a/src/os/unix/net/listener.rs b/src/os/unix/net/listener.rs
index ecced86..e77d423 100644
--- a/src/os/unix/net/listener.rs
+++ b/src/os/unix/net/listener.rs
@@ -195,6 +195,11 @@ impl Stream for Incoming<'_> {
 impl From<std::os::unix::net::UnixListener> for UnixListener {
     /// Converts a `std::os::unix::net::UnixListener` into its asynchronous equivalent.
     fn from(listener: std::os::unix::net::UnixListener) -> UnixListener {
+        // Make sure we are in nonblocking mode.
+        listener
+            .set_nonblocking(true)
+            .expect("failed to set nonblocking mode");
+
         let mio_listener = mio::net::UnixListener::from_std(listener);
         UnixListener {
             watcher: Watcher::new(mio_listener),
diff --git a/src/os/unix/net/stream.rs b/src/os/unix/net/stream.rs
index 169ad22..3cd8fc9 100644
--- a/src/os/unix/net/stream.rs
+++ b/src/os/unix/net/stream.rs
@@ -235,6 +235,11 @@ impl fmt::Debug for UnixStream {
 impl From<std::os::unix::net::UnixStream> for UnixStream {
     /// Converts a `std::os::unix::net::UnixStream` into its asynchronous equivalent.
     fn from(stream: std::os::unix::net::UnixStream) -> UnixStream {
+        // Make sure we are in nonblocking mode.
+        stream
+            .set_nonblocking(true)
+            .expect("failed to set nonblocking mode");
+
         let mio_stream = mio::net::UnixStream::from_std(stream);
         UnixStream {
             watcher: Watcher::new(mio_stream),