diff --git a/libc-test/semver/dragonfly.txt b/libc-test/semver/dragonfly.txt
index 870cf6da692fa..e6b252e2051cc 100644
--- a/libc-test/semver/dragonfly.txt
+++ b/libc-test/semver/dragonfly.txt
@@ -1490,6 +1490,7 @@ setgroups
 sethostid
 sethostname
 setitimer
+setlogin
 setpriority
 setproctitle
 setprogname
diff --git a/libc-test/semver/freebsd.txt b/libc-test/semver/freebsd.txt
index 953689ee09477..19f6b614b5904 100644
--- a/libc-test/semver/freebsd.txt
+++ b/libc-test/semver/freebsd.txt
@@ -2134,6 +2134,7 @@ setgroups
 sethostid
 sethostname
 setitimer
+setlogin
 setpriority
 setproctitle
 setprogname
diff --git a/libc-test/semver/netbsd.txt b/libc-test/semver/netbsd.txt
index 6dd75bde8634a..6150dbb81c41c 100644
--- a/libc-test/semver/netbsd.txt
+++ b/libc-test/semver/netbsd.txt
@@ -1491,6 +1491,7 @@ setgroups
 sethostid
 sethostname
 setitimer
+setlogin
 setpriority
 setproctitle
 setprogname
diff --git a/libc-test/semver/openbsd.txt b/libc-test/semver/openbsd.txt
index bcd65e09e5792..afbf8eb572869 100644
--- a/libc-test/semver/openbsd.txt
+++ b/libc-test/semver/openbsd.txt
@@ -1199,6 +1199,7 @@ setgroups
 sethostid
 sethostname
 setitimer
+setlogin
 setpriority
 setproctitle
 setprogname
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index 84e572edabee4..6ce041357ebee 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -628,6 +628,7 @@ extern "C" {
     pub fn getifaddrs(ifap: *mut *mut ::ifaddrs) -> ::c_int;
     pub fn freeifaddrs(ifa: *mut ::ifaddrs);
     pub fn setgroups(ngroups: ::c_int, ptr: *const ::gid_t) -> ::c_int;
+    pub fn setlogin(name: *const ::c_char) -> ::c_int;
     pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
     pub fn kqueue() -> ::c_int;
     pub fn unmount(target: *const ::c_char, arg: ::c_int) -> ::c_int;