diff --git a/changelog/2259.added.md b/changelog/2259.added.md
new file mode 100644
index 0000000000..244d9adb23
--- /dev/null
+++ b/changelog/2259.added.md
@@ -0,0 +1 @@
+Added `sys::eventfd` support on FreeBSD
diff --git a/src/sys/eventfd.rs b/src/sys/eventfd.rs
index 704a3e6873..50a4f091bd 100644
--- a/src/sys/eventfd.rs
+++ b/src/sys/eventfd.rs
@@ -4,9 +4,9 @@ use std::os::unix::io::{FromRawFd, OwnedFd, AsRawFd, AsFd, RawFd, BorrowedFd};
 
 libc_bitflags! {
     pub struct EfdFlags: libc::c_int {
-        EFD_CLOEXEC; // Since Linux 2.6.27
-        EFD_NONBLOCK; // Since Linux 2.6.27
-        EFD_SEMAPHORE; // Since Linux 2.6.30
+        EFD_CLOEXEC; // Since Linux 2.6.27/FreeBSD 13.0
+        EFD_NONBLOCK; // Since Linux 2.6.27/FreeBSD 13.0
+        EFD_SEMAPHORE; // Since Linux 2.6.30/FreeBSD 13.0
     }
 }
 
@@ -81,4 +81,4 @@ impl From<EventFd> for OwnedFd {
     fn from(x: EventFd) -> OwnedFd {
         x.0
     }
-}
\ No newline at end of file
+}
diff --git a/src/sys/mod.rs b/src/sys/mod.rs
index 1d875ccd51..93339d1935 100644
--- a/src/sys/mod.rs
+++ b/src/sys/mod.rs
@@ -20,7 +20,7 @@ feature! {
     #[cfg(bsd)]
     pub mod event;
 
-    #[cfg(linux_android)]
+    #[cfg(any(linux_android, target_os = "freebsd"))]
     #[allow(missing_docs)]
     pub mod eventfd;
 }