1 files changed, 4 insertions, 2 deletions
diff --git a/library/std/src/sys/unix/mod.rs b/library/std/src/sys/unix/mod.rs
index ddec60961f0..34a023b02c4 100644
--- a/library/std/src/sys/unix/mod.rs
+++ b/library/std/src/sys/unix/mod.rs
@@ -88,6 +88,7 @@ pub unsafe fn init(argc: isize, argv: *const *const u8) {
             target_os = "ios",
             target_os = "redox",
             target_os = "l4re",
+            target_os = "horizon",
         )))]
         'poll: {
             use crate::sys::os::errno;
@@ -131,6 +132,7 @@ pub unsafe fn init(argc: isize, argv: *const *const u8) {
             target_os = "fuchsia",
             target_os = "vxworks",
             target_os = "l4re",
+            target_os = "horizon",
         )))]
         {
             use crate::sys::os::errno;
@@ -149,7 +151,7 @@ pub unsafe fn init(argc: isize, argv: *const *const u8) {
     }
 
     unsafe fn reset_sigpipe() {
-        #[cfg(not(any(target_os = "emscripten", target_os = "fuchsia")))]
+        #[cfg(not(any(target_os = "emscripten", target_os = "fuchsia", target_os = "horizon")))]
         rtassert!(signal(libc::SIGPIPE, libc::SIG_IGN) != libc::SIG_ERR);
     }
 }
@@ -344,7 +346,7 @@ cfg_if::cfg_if! {
     }
 }
 
-#[cfg(target_os = "espidf")]
+#[cfg(any(target_os = "espidf", target_os = "horizon"))]
 mod unsupported {
     use crate::io;