diff --git a/src/unix/fs.c b/src/unix/fs.c
index 0623fe6b..d7456228 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -447,7 +447,12 @@ int uv_fs_fsync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
 
 int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   char* path = NULL;
+#ifdef __FreeBSD__
+  /* freebsd doesn't have fdatasync, do a full fsync instead. */
+  WRAP_EIO(UV_FS_FDATASYNC, eio_fdatasync, fsync, ARGS1(file))
+#else
   WRAP_EIO(UV_FS_FDATASYNC, eio_fdatasync, fdatasync, ARGS1(file))
+#endif
 }