diff --git a/libc-test/semver/dragonfly.txt b/libc-test/semver/dragonfly.txt
index 1e6a5f4791cfd..20efcf664696a 100644
--- a/libc-test/semver/dragonfly.txt
+++ b/libc-test/semver/dragonfly.txt
@@ -1296,6 +1296,7 @@ clock_getcpuclockid
 clock_getres
 clock_nanosleep
 clock_settime
+closefrom
 cmsgcred
 cmsghdr
 cpuctl_cpuid_args_t
diff --git a/libc-test/semver/netbsd.txt b/libc-test/semver/netbsd.txt
index 7c914ebbe9fed..d9e1b66c233a4 100644
--- a/libc-test/semver/netbsd.txt
+++ b/libc-test/semver/netbsd.txt
@@ -1252,6 +1252,7 @@ clearerr
 clock_getres
 clock_nanosleep
 clock_settime
+closefrom
 cmsghdr
 consttime_memequal
 daemon
diff --git a/libc-test/semver/openbsd.txt b/libc-test/semver/openbsd.txt
index f2d8064b00ae0..f609a7b72cd45 100644
--- a/libc-test/semver/openbsd.txt
+++ b/libc-test/semver/openbsd.txt
@@ -1064,6 +1064,7 @@ chroot
 clearerr
 clock_getres
 clock_settime
+closefrom
 cmsghdr
 daemon
 devname
diff --git a/src/unix/bsd/freebsdlike/dragonfly/mod.rs b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
index e2fe4f81d4418..75365cdc587ac 100644
--- a/src/unix/bsd/freebsdlike/dragonfly/mod.rs
+++ b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
@@ -1702,6 +1702,8 @@ extern "C" {
         mntvbufp: *mut *mut crate::statvfs,
         flags: c_int,
     ) -> c_int;
+
+    pub fn closefrom(lowfd: c_int) -> c_int;
 }
 
 #[link(name = "rt")]
diff --git a/src/unix/bsd/netbsdlike/mod.rs b/src/unix/bsd/netbsdlike/mod.rs
index 0444353b1de42..acf61c26c47ce 100644
--- a/src/unix/bsd/netbsdlike/mod.rs
+++ b/src/unix/bsd/netbsdlike/mod.rs
@@ -856,6 +856,8 @@ extern "C" {
         flags: c_int,
         timeout: *mut crate::timespec,
     ) -> c_int;
+
+    pub fn closefrom(lowfd: c_int) -> c_int;
 }
 
 cfg_if! {