diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 74f23c2..00e32d9 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4356,6 +4356,8 @@ retry:
 			ret = PTR_ERR(handle);
 			break;
 		}
+		if (file->f_flags & O_SYNC)
+			ext4_handle_sync(handle);
 		ret = ext4_map_blocks(handle, inode, &map, flags);
 		if (ret <= 0) {
 #ifdef EXT4FS_DEBUG