diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11d7774b17..058384f8c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,12 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   ([#853](https://github.com/nix-rust/nix/pull/853))
 - Added `statvfs` module to all MacOS and Linux architectures.
   ([#832](https://github.com/nix-rust/nix/pull/832))
+- Added `EVFILT_EMPTY`, `EVFILT_PROCDESC` and `EVFILT_SENDFILE` on FreeBSD.
+  ([#825](https://github.com/nix-rust/nix/pull/825))
+- Exposed `termios::cfmakesane` on FreeBSD.
+  ([#825](https://github.com/nix-rust/nix/pull/825))
+- Exposed `MSG_CMSG_CLOEXEC` on *BSD.
+  ([#825](https://github.com/nix-rust/nix/pull/825))
 
 ### Changed
 - Display and Debug for SysControlAddr now includes all fields.
diff --git a/src/sys/event.rs b/src/sys/event.rs
index 3a6c528d85..e2a4eaa16e 100644
--- a/src/sys/event.rs
+++ b/src/sys/event.rs
@@ -40,6 +40,9 @@ libc_enum! {
     #[cfg_attr(not(target_os = "netbsd"), repr(i16))]
     pub enum EventFilter {
         EVFILT_AIO,
+        /// Returns whenever there is no remaining data in the write buffer
+        #[cfg(target_os = "freebsd")]
+        EVFILT_EMPTY,
         #[cfg(target_os = "dragonfly")]
         EVFILT_EXCEPT,
         #[cfg(any(target_os = "dragonfly",
@@ -52,7 +55,16 @@ libc_enum! {
         #[cfg(any(target_os = "ios", target_os = "macos"))]
         EVFILT_MACHPORT,
         EVFILT_PROC,
+        /// Returns events associated with the process referenced by a given
+        /// process descriptor, created by `pdfork()`. The events to monitor are:
+        ///
+        /// - NOTE_EXIT: the process has exited. The exit status will be stored in data.
+        #[cfg(target_os = "freebsd")]
+        EVFILT_PROCDESC,
         EVFILT_READ,
+        /// Returns whenever an asynchronous `sendfile()` call completes.
+        #[cfg(target_os = "freebsd")]
+        EVFILT_SENDFILE,
         EVFILT_SIGNAL,
         EVFILT_TIMER,
         #[cfg(any(target_os = "dragonfly",
diff --git a/src/sys/socket/mod.rs b/src/sys/socket/mod.rs
index beef3db804..af66bc4715 100644
--- a/src/sys/socket/mod.rs
+++ b/src/sys/socket/mod.rs
@@ -163,7 +163,12 @@ libc_bitflags!{
         /// [open(2)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html).
         ///
         /// Only used in [`recvmsg`](fn.recvmsg.html) function.
-        #[cfg(any(target_os = "linux", target_os = "android"))]
+        #[cfg(any(target_os = "android",
+                  target_os = "dragonfly",
+                  target_os = "freebsd",
+                  target_os = "linux",
+                  target_os = "netbsd",
+                  target_os = "openbsd"))]
         MSG_CMSG_CLOEXEC;
     }
 }
diff --git a/src/sys/termios.rs b/src/sys/termios.rs
index 356c7769bb..11cacd7c57 100644
--- a/src/sys/termios.rs
+++ b/src/sys/termios.rs
@@ -1023,6 +1023,19 @@ pub fn cfmakeraw(termios: &mut Termios) {
     termios.update_wrapper();
 }
 
+/// Configures the port to "sane" mode (like the configuration of a newly created terminal) (see
+/// [tcsetattr(3)](https://www.freebsd.org/cgi/man.cgi?query=tcsetattr)).
+///
+/// Note that this is a non-standard function, available on FreeBSD.
+#[cfg(target_os = "freebsd")]
+pub fn cfmakesane(termios: &mut Termios) {
+    let inner_termios = unsafe { termios.get_libc_termios_mut() };
+    unsafe {
+        libc::cfmakesane(inner_termios);
+    }
+    termios.update_wrapper();
+}
+
 /// Return the configuration of a port
 /// [tcgetattr(3p)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/tcgetattr.html)).
 ///