diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index 054a1bd00..613507d35 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -64,7 +64,7 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 
 	// set etag
 	etag := filer.ETagEntry(entry)
-	if ifm := r.Header.Get("If-Match"); ifm != "" && ifm != "\""+etag+"\"" {
+	if ifm := r.Header.Get("If-Match"); ifm != "" && (ifm != "\""+etag+"\"" && ifm != etag){
 		w.WriteHeader(http.StatusPreconditionFailed)
 		return
 	}