diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 83911e62..7981f723 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -2352,7 +2352,8 @@ extern {
     pub fn querylocale(mask: ::c_int, loc: ::locale_t) -> *const ::c_char;
     pub fn getpriority(which: ::c_int, who: ::id_t) -> ::c_int;
     pub fn setpriority(which: ::c_int, who: ::id_t, prio: ::c_int) -> ::c_int;
-
+    pub fn getdomainname(name: *mut ::c_char, len: ::c_int) -> ::c_int;
+    pub fn setdomainname(name: *const ::c_char, len: ::c_int) -> ::c_int;
     pub fn getxattr(path: *const ::c_char, name: *const ::c_char,
                     value: *mut ::c_void, size: ::size_t, position: u32,
                     flags: ::c_int) -> ::ssize_t;
diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
index 5cea7595..80a66b73 100644
--- a/src/unix/bsd/freebsdlike/mod.rs
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -1157,6 +1157,8 @@ extern {
                  timeout: *const ::timespec,
                  sigmask: *const sigset_t) -> ::c_int;
     pub fn settimeofday(tv: *const ::timeval, tz: *const ::timezone) -> ::c_int;
+    pub fn getdomainname(name: *mut ::c_char, len: ::c_int) -> ::c_int;
+    pub fn setdomainname(name: *const ::c_char, len: ::c_int) -> ::c_int;
 }
 
 cfg_if! {
diff --git a/src/unix/bsd/netbsdlike/mod.rs b/src/unix/bsd/netbsdlike/mod.rs
index 9179e6af..0ab09f66 100644
--- a/src/unix/bsd/netbsdlike/mod.rs
+++ b/src/unix/bsd/netbsdlike/mod.rs
@@ -625,6 +625,8 @@ extern {
     pub fn fexecve(fd: ::c_int, argv: *const *const ::c_char,
                    envp: *const *const ::c_char)
                    -> ::c_int;
+    pub fn getdomainname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
+    pub fn setdomainname(name: *const ::c_char, len: ::size_t) -> ::c_int;
 }
 
 cfg_if! {