diff --git a/src/unix/fs.c b/src/unix/fs.c
index 8d26cd8fe..c8a2d632c 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -98,10 +98,12 @@
 
 
 static ssize_t uv__fs_fdatasync(uv_fs_t* req) {
-#if defined(__APPLE__) && defined(F_FULLFSYNC)
+#if defined(__linux__) || defined(__sun) || defined(__NetBSD__)
+  return fdatasync(req->file);
+#elif defined(__APPLE__) && defined(F_FULLFSYNC)
   return fcntl(req->file, F_FULLFSYNC);
 #else
-  return fdatasync(req->file);
+  return fsync(req->file);
 #endif
 }