diff --git a/src/tcp.rs b/src/tcp.rs
index 17f360f..c85338d 100644
--- a/src/tcp.rs
+++ b/src/tcp.rs
@@ -68,10 +68,11 @@ pub(crate) fn new_socket(addr: std::net::SocketAddr, reuse: bool) -> Result<TcpS
         std::net::SocketAddr::V6(..) => TcpSocket::new_v6()?,
     };
     if reuse {
-        // windows has no reuse_port, but it's reuse_address
+        // windows has no reuse_port, but its reuse_address
         // almost equals to unix's reuse_port + reuse_address,
         // though may introduce nondeterministic behavior
-        #[cfg(unix)]
+        // illumos has no support for SO_REUSEPORT
+        #[cfg(all(unix, not(target_os = "illumos")))]
         socket.set_reuseport(true).ok();
         socket.set_reuseaddr(true).ok();
     }
@@ -226,6 +227,8 @@ pub async fn listen_any(port: u16) -> ResultType<TcpListener> {
     if let Ok(mut socket) = TcpSocket::new_v6() {
         #[cfg(unix)]
         {
+            // illumos has no support for SO_REUSEPORT
+            #[cfg(not(target_os = "illumos"))]
             socket.set_reuseport(true).ok();
             socket.set_reuseaddr(true).ok();
             use std::os::unix::io::{FromRawFd, IntoRawFd};
diff --git a/src/udp.rs b/src/udp.rs
index 68abd42..fbdf332 100644
--- a/src/udp.rs
+++ b/src/udp.rs
@@ -20,10 +20,11 @@ fn new_socket(addr: SocketAddr, reuse: bool, buf_size: usize) -> Result<Socket,
         SocketAddr::V6(..) => Socket::new(Domain::ipv6(), Type::dgram(), None),
     }?;
     if reuse {
-        // windows has no reuse_port, but it's reuse_address
+        // windows has no reuse_port, but its reuse_address
         // almost equals to unix's reuse_port + reuse_address,
         // though may introduce nondeterministic behavior
-        #[cfg(unix)]
+        // illumos has no support for SO_REUSEPORT
+        #[cfg(all(unix, not(target_os = "illumos")))]
         socket.set_reuse_port(true).ok();
         socket.set_reuse_address(true).ok();
     }