diff --git a/src/backend/libc/system/syscalls.rs b/src/backend/libc/system/syscalls.rs
index 0c5b0f7d5..af115b765 100644
--- a/src/backend/libc/system/syscalls.rs
+++ b/src/backend/libc/system/syscalls.rs
@@ -67,6 +67,7 @@ pub(crate) fn sethostname(name: &[u8]) -> io::Result<()> {
     target_os = "android",
     target_os = "emscripten",
     target_os = "espidf",
+    target_os = "illumos",
     target_os = "haiku",
     target_os = "redox",
     target_os = "vita",
diff --git a/src/system.rs b/src/system.rs
index 6d97158c0..bddb16c69 100644
--- a/src/system.rs
+++ b/src/system.rs
@@ -180,6 +180,7 @@ pub fn sethostname(name: &[u8]) -> io::Result<()> {
     target_os = "emscripten",
     target_os = "espidf",
     target_os = "haiku",
+    target_os = "illumos",
     target_os = "redox",
     target_os = "vita",
     target_os = "wasi"