diff --git a/src/unix/fs.c b/src/unix/fs.c
index d7456228..ec24e8b3 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -447,8 +447,11 @@ 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. */
+#if defined(__FreeBSD__) \
+  || (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1060)
+  /* freebsd and pre-10.6 darwin don'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))