diff --git a/build.rs b/build.rs
index 562025dfdc7ab..3ce6995e7092f 100644
--- a/build.rs
+++ b/build.rs
@@ -21,7 +21,7 @@ const ALLOWED_CFGS: &'static [&'static str] = &[
 
 // Extra values to allow for check-cfg.
 const CHECK_CFG_EXTRA: &'static [(&'static str, &'static [&'static str])] = &[
-    ("target_os", &["switch", "aix", "ohos", "hurd"]),
+    ("target_os", &["switch", "aix", "ohos", "hurd", "visionos"]),
     ("target_env", &["illumos", "wasi", "aix", "ohos"]),
     (
         "target_arch",
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 5cad5d320e472..6b670b927168e 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -6242,7 +6242,7 @@ cfg_if! {
     }
 }
 cfg_if! {
-    if #[cfg(any(target_os = "macos", target_os = "ios", target_os = "tvos"))] {
+    if #[cfg(any(target_os = "macos", target_os = "ios", target_os = "tvos", target_os = "visionos"))] {
         extern "C" {
             pub fn memmem(
                 haystack: *const ::c_void,
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index e2b5121b03911..229060f066b66 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -39,6 +39,7 @@ s! {
                       target_os = "ios",
                       target_os = "tvos",
                       target_os = "watchos",
+                      target_os = "visionos",
                       target_os = "netbsd",
                       target_os = "openbsd")))]
         pub pw_fields: ::c_int,
@@ -924,7 +925,7 @@ cfg_if! {
 }
 
 cfg_if! {
-    if #[cfg(any(target_os = "macos", target_os = "ios", target_os = "tvos", target_os = "watchos"))] {
+    if #[cfg(any(target_os = "macos", target_os = "ios", target_os = "tvos", target_os = "watchos", target_os = "visionos"))] {
         mod apple;
         pub use self::apple::*;
     } else if #[cfg(any(target_os = "openbsd", target_os = "netbsd"))] {
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 0b270c0a39bca..ac4ba0f0c9cb3 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -369,6 +369,7 @@ cfg_if! {
                         target_os = "ios",
                         target_os = "tvos",
                         target_os = "watchos",
+                        target_os = "visionos",
                         target_os = "android",
                         target_os = "openbsd",
                         target_os = "nto",
@@ -1018,7 +1019,8 @@ extern "C" {
             target_os = "macos",
             target_os = "ios",
             target_os = "tvos",
-            target_os = "watchos"
+            target_os = "watchos",
+            target_os = "visionos"
         ),
         link_name = "realpath$DARWIN_EXTSN"
     )]
@@ -1186,7 +1188,8 @@ extern "C" {
             target_os = "macos",
             target_os = "ios",
             target_os = "tvos",
-            target_os = "watchos"
+            target_os = "watchos",
+            target_os = "visionos"
         ),
         link_name = "res_9_init"
     )]
@@ -1523,6 +1526,7 @@ cfg_if! {
                         target_os = "ios",
                         target_os = "tvos",
                         target_os = "watchos",
+                        target_os = "visionos",
                         target_os = "freebsd",
                         target_os = "dragonfly",
                         target_os = "openbsd",