diff --git a/cmd/dfdaemon/app/root.go b/cmd/dfdaemon/app/root.go
index eeb123d45..534526b4a 100644
--- a/cmd/dfdaemon/app/root.go
+++ b/cmd/dfdaemon/app/root.go
@@ -95,7 +95,7 @@ func init() {
 	rf.String("localrepo", filepath.Join(os.Getenv("HOME"), ".small-dragonfly/dfdaemon/data/"), "temp output dir of dfdaemon")
 	rf.String("dfpath", defaultDfgetPath, "dfget path")
 	rf.Var(netutils.NetLimit(), "ratelimit", "net speed limit")
-	rf.StringSlice("node", []string{"127.0.0.1:8002"}, "specify the addresses(host:port) of supernodes that will be passed to dfget.")
+	rf.StringSlice("node", nil, "specify the addresses(host:port) of supernodes that will be passed to dfget.")
 
 	exitOnError(bindRootFlags(viper.GetViper()), "bind root command flags")
 }
diff --git a/cmd/dfdaemon/app/root_test.go b/cmd/dfdaemon/app/root_test.go
index df7a5e719..e3b2e33f6 100644
--- a/cmd/dfdaemon/app/root_test.go
+++ b/cmd/dfdaemon/app/root_test.go
@@ -76,7 +76,7 @@ func (ts *rootTestSuite) TestNodeFlag() {
 		r.Equal([]string{"127.0.0.1:6666"}, cfg.SuperNodes)
 	}
 
-	// flag not set, config file doesn't exist, should use default
+	// flag not set, config file doesn't exist, should be nil
 	{
 		v := viper.New()
 		v.SetFs(fs)
@@ -86,7 +86,7 @@ func (ts *rootTestSuite) TestNodeFlag() {
 		r.NotNil(readConfigFile(v, rootCmd))
 		cfg, err := getConfigFromViper(rootCmd, v)
 		r.Nil(err)
-		r.Equal([]string{"127.0.0.1:8002"}, cfg.SuperNodes)
+		r.EqualValues([]string(nil), cfg.SuperNodes)
 	}
 
 	// when --node flag is set, should always use the flag
diff --git a/dfdaemon/downloader/dfget/dfget.go b/dfdaemon/downloader/dfget/dfget.go
index a4a42a0c3..221d5eede 100644
--- a/dfdaemon/downloader/dfget/dfget.go
+++ b/dfdaemon/downloader/dfget/dfget.go
@@ -77,7 +77,9 @@ func (dfGetter *DFGetter) getCommand(
 	}
 	add("-s", dfGetter.config.RateLimit)
 	add("--totallimit", dfGetter.config.RateLimit)
-	add("--node", strings.Join(dfGetter.config.SuperNodes, ","))
+	if len(dfGetter.config.SuperNodes) > 0 {
+		add("--node", strings.Join(dfGetter.config.SuperNodes, ","))
+	}
 
 	for key, value := range header {
 		// discard HTTP host header for backing to source successfully