diff --git a/src/backend/libc/event/syscalls.rs b/src/backend/libc/event/syscalls.rs
index 268638287..c9373180d 100644
--- a/src/backend/libc/event/syscalls.rs
+++ b/src/backend/libc/event/syscalls.rs
@@ -477,7 +477,7 @@ pub(crate) fn port_send(
     unsafe { ret(c::port_send(borrowed_fd(port), events, userdata)) }
 }
 
-#[cfg(not(any(target_os = "redox", target_os = "wasi")))]
+#[cfg(not(target_os = "wasi"))]
 pub(crate) fn pause() {
     let r = unsafe { c::pause() };
     let errno = libc_errno::errno().0;
diff --git a/src/backend/libc/time/syscalls.rs b/src/backend/libc/time/syscalls.rs
index 8c730cef0..5c8fa1b07 100644
--- a/src/backend/libc/time/syscalls.rs
+++ b/src/backend/libc/time/syscalls.rs
@@ -258,11 +258,7 @@ fn clock_gettime_dynamic_old(id: c::clockid_t) -> io::Result<Timespec> {
     })
 }
 
-#[cfg(not(any(
-    target_os = "redox",
-    target_os = "wasi",
-    all(apple, not(target_os = "macos"))
-)))]
+#[cfg(not(any(target_os = "wasi", all(apple, not(target_os = "macos")))))]
 #[inline]
 pub(crate) fn clock_settime(id: ClockId, timespec: Timespec) -> io::Result<()> {
     // Old 32-bit version: libc has `clock_gettime` but it is not y2038 safe by
diff --git a/src/event/mod.rs b/src/event/mod.rs
index 29dfc2272..e925379cb 100644
--- a/src/event/mod.rs
+++ b/src/event/mod.rs
@@ -11,7 +11,7 @@ pub mod epoll;
 mod eventfd;
 #[cfg(bsd)]
 pub mod kqueue;
-#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[cfg(not(any(windows, target_os = "wasi")))]
 mod pause;
 mod poll;
 #[cfg(solarish)]
@@ -27,7 +27,7 @@ pub use crate::timespec::{Nsecs, Secs, Timespec};
     target_os = "espidf"
 ))]
 pub use eventfd::{eventfd, EventfdFlags};
-#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
+#[cfg(not(any(windows, target_os = "wasi")))]
 pub use pause::*;
 pub use poll::{poll, PollFd, PollFlags};
 #[cfg(any(bsd, linux_kernel, windows, target_os = "wasi"))]