diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index c3f06ae8a..bee153cc5 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -102,6 +102,8 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 
 	// write the request to volume servers
 
+	fh.f.entry.Attributes.FileSize = uint64(max(req.Offset+int64(len(req.Data)), int64(fh.f.entry.Attributes.FileSize)))
+
 	chunks, err := fh.dirtyPages.AddPage(ctx, req.Offset, req.Data)
 	if err != nil {
 		glog.Errorf("%+v/%v write fh %d: [%d,%d): %v", fh.f.dir.Path, fh.f.Name, fh.handle, req.Offset, req.Offset+int64(len(req.Data)), err)