diff --git a/changelog/2404.added.md b/changelog/2404.added.md
new file mode 100644
index 0000000000..7f50f5bb01
--- /dev/null
+++ b/changelog/2404.added.md
@@ -0,0 +1 @@
+`O_DSYNC` may now be used with `aio_fsync` and `fcntl` on FreeBSD.
diff --git a/src/fcntl.rs b/src/fcntl.rs
index 043cdde473..fd8d4b847c 100644
--- a/src/fcntl.rs
+++ b/src/fcntl.rs
@@ -114,7 +114,7 @@ libc_bitflags!(
         /// If the specified path isn't a directory, fail.
         O_DIRECTORY;
         /// Implicitly follow each `write()` with an `fdatasync()`.
-        #[cfg(any(linux_android, apple_targets, netbsdlike))]
+        #[cfg(any(linux_android, apple_targets, target_os = "freebsd", netbsdlike))]
         O_DSYNC;
         /// Error out if a file was not created.
         O_EXCL;
diff --git a/src/sys/aio.rs b/src/sys/aio.rs
index 8d9e6c8061..c7ba40534c 100644
--- a/src/sys/aio.rs
+++ b/src/sys/aio.rs
@@ -55,6 +55,7 @@ libc_enum! {
         /// on supported operating systems only, do it like `fdatasync`
         #[cfg(any(apple_targets,
                   target_os = "linux",
+                  target_os = "freebsd",
                   netbsdlike))]
         O_DSYNC
     }