diff --git a/changelog/2537.added.md b/changelog/2537.added.md
index e6eac2b197..110b82ab34 100644
--- a/changelog/2537.added.md
+++ b/changelog/2537.added.md
@@ -1 +1 @@
-Add support for `syslog`, `openlog`, `closelog` on `macos`.
+Add support for `syslog`, `openlog`, `closelog` on all `unix`.
diff --git a/src/lib.rs b/src/lib.rs
index 42a4aae34a..bd8e552f61 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -202,7 +202,6 @@ feature! {
     pub mod spawn;
 }
 
-#[cfg(unix)]
 feature! {
     #![feature = "syslog"]
     pub mod syslog;
diff --git a/src/syslog.rs b/src/syslog.rs
index 0c09730645..cdb2c3ce3d 100644
--- a/src/syslog.rs
+++ b/src/syslog.rs
@@ -40,7 +40,12 @@ where
 /// ```rust
 /// use nix::syslog::{openlog, syslog, Facility, LogFlags, Severity};
 ///
-/// openlog(None::<&str>, LogFlags::LOG_PID, Facility::LOG_USER).unwrap();
+/// #[cfg(not(target_os = "haiku"))]
+/// let flags = LogFlags::LOG_PID;
+/// #[cfg(target_os = "haiku")]
+/// let flags = LogFlags::empty();
+///
+/// openlog(None::<&str>, flags, Facility::LOG_USER).unwrap();
 /// syslog(Severity::LOG_EMERG, "Hello, nix!").unwrap();
 ///
 /// // use `format!` to format the message
diff --git a/test/test.rs b/test/test.rs
index 7947c5795a..3ca7c0a755 100644
--- a/test/test.rs
+++ b/test/test.rs
@@ -42,7 +42,6 @@ mod test_sendfile;
 ))]
 mod test_spawn;
 
-#[cfg(unix)]
 mod test_syslog;
 
 mod test_time;
diff --git a/test/test_syslog.rs b/test/test_syslog.rs
index ad83b1e5a9..d0f6e780d9 100644
--- a/test/test_syslog.rs
+++ b/test/test_syslog.rs
@@ -2,7 +2,12 @@ use nix::syslog::{openlog, syslog, Facility, LogFlags, Severity};
 
 #[test]
 fn test_syslog_hello_world() {
-    openlog(None::<&str>, LogFlags::LOG_PID, Facility::LOG_USER).unwrap();
+    #[cfg(not(target_os = "haiku"))]
+    let flags = LogFlags::LOG_PID;
+    #[cfg(target_os = "haiku")]
+    let flags = LogFlags::empty();
+
+    openlog(None::<&str>, flags, Facility::LOG_USER).unwrap();
     syslog(Severity::LOG_EMERG, "Hello, nix!").unwrap();
 
     let name = "syslog";