diff --git a/src/sys/unix.rs b/src/sys/unix.rs
index c187d517..970bbb42 100644
--- a/src/sys/unix.rs
+++ b/src/sys/unix.rs
@@ -1834,6 +1834,8 @@ impl crate::Socket {
             target_os = "macos",
             target_os = "tvos",
             target_os = "watchos",
+            target_os = "illumos",
+            target_os = "solaris",
         )
     ))]
     pub fn bind_device_by_index_v4(&self, interface: Option<NonZeroU32>) -> io::Result<()> {
@@ -1859,6 +1861,8 @@ impl crate::Socket {
             target_os = "macos",
             target_os = "tvos",
             target_os = "watchos",
+            target_os = "illumos",
+            target_os = "solaris",
         )
     ))]
     pub fn bind_device_by_index_v6(&self, interface: Option<NonZeroU32>) -> io::Result<()> {
@@ -1879,6 +1883,8 @@ impl crate::Socket {
             target_os = "macos",
             target_os = "tvos",
             target_os = "watchos",
+            target_os = "illumos",
+            target_os = "solaris",
         )
     ))]
     pub fn device_index_v4(&self) -> io::Result<Option<NonZeroU32>> {
@@ -1900,6 +1906,8 @@ impl crate::Socket {
             target_os = "macos",
             target_os = "tvos",
             target_os = "watchos",
+            target_os = "illumos",
+            target_os = "solaris",
         )
     ))]
     pub fn device_index_v6(&self) -> io::Result<Option<NonZeroU32>> {