diff --git a/src/libstd/sys/redox/fd.rs b/src/libstd/sys/redox/fd.rs
index 47d2280fe05f..b716965860e1 100644
--- a/src/libstd/sys/redox/fd.rs
+++ b/src/libstd/sys/redox/fd.rs
@@ -48,6 +48,16 @@ impl FileDesc {
         cvt(libc::write(self.fd, buf))
     }
 
+    pub fn duplicate(&self) -> io::Result<FileDesc> {
+        let new_fd = cvt(libc::dup(self.fd, &[]))?;
+        Ok(FileDesc::new(new_fd))
+    }
+
+    pub fn nonblocking(&self) -> io::Result<bool> {
+        let flags = cvt(libc::fcntl(self.fd, libc::F_GETFL, 0))?;
+        Ok(flags & libc::O_NONBLOCK == libc::O_NONBLOCK)
+    }
+
     pub fn set_cloexec(&self) -> io::Result<()> {
         let mut flags = cvt(libc::fcntl(self.fd, libc::F_GETFL, 0))?;
         flags |= libc::O_CLOEXEC;
@@ -63,11 +73,6 @@ impl FileDesc {
         }
         cvt(libc::fcntl(self.fd, libc::F_SETFL, flags)).and(Ok(()))
     }
-
-    pub fn duplicate(&self) -> io::Result<FileDesc> {
-        let new_fd = cvt(libc::dup(self.fd, &[]))?;
-        Ok(FileDesc::new(new_fd))
-    }
 }
 
 impl<'a> Read for &'a FileDesc {
diff --git a/src/libstd/sys/redox/net/tcp.rs b/src/libstd/sys/redox/net/tcp.rs
index 351c534c036d..ceaa5df267fd 100644
--- a/src/libstd/sys/redox/net/tcp.rs
+++ b/src/libstd/sys/redox/net/tcp.rs
@@ -58,7 +58,7 @@ impl TcpStream {
     }
 
     pub fn nonblocking(&self) -> Result<bool> {
-        Err(Error::new(ErrorKind::Other, "TcpStream::nonblocking not implemented"))
+        self.0.fd().nonblocking()
     }
 
     pub fn only_v6(&self) -> Result<bool> {
@@ -81,8 +81,8 @@ impl TcpStream {
         Err(Error::new(ErrorKind::Other, "TcpStream::set_nodelay not implemented"))
     }
 
-    pub fn set_nonblocking(&self, _nonblocking: bool) -> Result<()> {
-        Err(Error::new(ErrorKind::Other, "TcpStream::set_nonblocking not implemented"))
+    pub fn set_nonblocking(&self, nonblocking: bool) -> Result<()> {
+        self.0.fd().set_nonblocking(nonblocking)
     }
 
     pub fn set_only_v6(&self, _only_v6: bool) -> Result<()> {
diff --git a/src/libstd/sys/redox/net/udp.rs b/src/libstd/sys/redox/net/udp.rs
index a259db6a4c04..7856de033eb1 100644
--- a/src/libstd/sys/redox/net/udp.rs
+++ b/src/libstd/sys/redox/net/udp.rs
@@ -90,7 +90,7 @@ impl UdpSocket {
     }
 
     pub fn nonblocking(&self) -> Result<bool> {
-        Err(Error::new(ErrorKind::Other, "UdpSocket::nonblocking not implemented"))
+        self.0.fd().nonblocking()
     }
 
     pub fn only_v6(&self) -> Result<bool> {
@@ -125,8 +125,8 @@ impl UdpSocket {
         Err(Error::new(ErrorKind::Other, "UdpSocket::set_multicast_ttl_v4 not implemented"))
     }
 
-    pub fn set_nonblocking(&self, _nonblocking: bool) -> Result<()> {
-        Err(Error::new(ErrorKind::Other, "UdpSocket::set_nonblocking not implemented"))
+    pub fn set_nonblocking(&self, nonblocking: bool) -> Result<()> {
+        self.0.fd().set_nonblocking(nonblocking)
     }
 
     pub fn set_only_v6(&self, _only_v6: bool) -> Result<()> {