diff --git a/Cargo.toml b/Cargo.toml
index 1d4e100..1a74b6b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -48,6 +48,3 @@ features = [
 [dev-dependencies]
 easy-parallel = "3.1.0"
 fastrand = "2.0.0"
-
-[target.'cfg(any(unix, target_os = "fuchsia", target_os = "vxworks"))'.dev_dependencies]
-libc = "0.2"
diff --git a/examples/wait-signal.rs b/examples/wait-signal.rs
index 4a645af..d4f5bc3 100644
--- a/examples/wait-signal.rs
+++ b/examples/wait-signal.rs
@@ -20,7 +20,7 @@ mod example {
         let poller = Poller::new().unwrap();
 
         // Register SIGINT in the poller.
-        let sigint = Signal(libc::SIGINT);
+        let sigint = Signal(rustix::process::Signal::Int as _);
         poller.add_filter(sigint, 1, PollMode::Oneshot).unwrap();
 
         let mut events = Events::new();
diff --git a/src/os/kqueue.rs b/src/os/kqueue.rs
index 982640b..f670527 100644
--- a/src/os/kqueue.rs
+++ b/src/os/kqueue.rs
@@ -37,7 +37,7 @@ pub trait PollerKqueueExt<F: Filter>: PollerSealed {
     /// let poller = Poller::new().unwrap();
     ///
     /// // Register the SIGINT signal.
-    /// poller.add_filter(Signal(libc::SIGINT), 0, PollMode::Oneshot).unwrap();
+    /// poller.add_filter(Signal(rustix::process::Signal::Int as _), 0, PollMode::Oneshot).unwrap();
     ///
     /// // Wait for the signal.
     /// let mut events = Events::new();
@@ -60,10 +60,10 @@ pub trait PollerKqueueExt<F: Filter>: PollerSealed {
     /// let poller = Poller::new().unwrap();
     ///
     /// // Register the SIGINT signal.
-    /// poller.add_filter(Signal(libc::SIGINT), 0, PollMode::Oneshot).unwrap();
+    /// poller.add_filter(Signal(rustix::process::Signal::Int as _), 0, PollMode::Oneshot).unwrap();
     ///
     /// // Re-register with a different key.
-    /// poller.modify_filter(Signal(libc::SIGINT), 1, PollMode::Oneshot).unwrap();
+    /// poller.modify_filter(Signal(rustix::process::Signal::Int as _), 1, PollMode::Oneshot).unwrap();
     ///
     /// // Wait for the signal.
     /// let mut events = Events::new();
@@ -86,10 +86,10 @@ pub trait PollerKqueueExt<F: Filter>: PollerSealed {
     /// let poller = Poller::new().unwrap();
     ///
     /// // Register the SIGINT signal.
-    /// poller.add_filter(Signal(libc::SIGINT), 0, PollMode::Oneshot).unwrap();
+    /// poller.add_filter(Signal(rustix::process::Signal::Int as _), 0, PollMode::Oneshot).unwrap();
     ///
     /// // Remove the filter.
-    /// poller.delete_filter(Signal(libc::SIGINT)).unwrap();
+    /// poller.delete_filter(Signal(rustix::process::Signal::Int as _)).unwrap();
     /// ```
     fn delete_filter(&self, filter: F) -> io::Result<()>;
 }