diff --git a/dfget/config/constants.go b/dfget/config/constants.go
index c062a66cc..7d0a1910b 100644
--- a/dfget/config/constants.go
+++ b/dfget/config/constants.go
@@ -116,9 +116,9 @@ const (
 	LocalHTTPPathRate   = "/rate/"
 	LocalHTTPPing       = "/server/ping"
 
-	DataExpireTime        = 3 * time.Minute
-	ServerAliveTime       = 5 * time.Minute
-	DefaultDownlodTimeout = 5 * time.Minute
+	DataExpireTime         = 3 * time.Minute
+	ServerAliveTime        = 5 * time.Minute
+	DefaultDownloadTimeout = 5 * time.Minute
 
 	DefaultSupernodePort = 8002
 )
diff --git a/dfget/core/core.go b/dfget/core/core.go
index aaf82d5e3..94a35310d 100644
--- a/dfget/core/core.go
+++ b/dfget/core/core.go
@@ -168,10 +168,7 @@ func registerToSuperNode(cfg *config.Config, register regist.SupernodeRegister)
 
 func downloadFile(cfg *config.Config, supernodeAPI api.SupernodeAPI,
 	register regist.SupernodeRegister, result *regist.RegisterResult) error {
-	timeout := netutils.CalculateTimeout(cfg.RV.FileLength, cfg.MinRate, config.DefaultMinRate, 10*time.Second)
-	if timeout == 0 && cfg.Timeout > 0 {
-		timeout = cfg.Timeout
-	}
+	timeout := calculateTimeout(cfg)
 
 	success := true
 	err := doDownload(cfg, supernodeAPI, register, result, timeout)
@@ -328,3 +325,19 @@ func reportMetrics(cfg *config.Config, supernodeAPI api.SupernodeAPI, downloadTi
 		}
 	}
 }
+
+func calculateTimeout(cfg *config.Config) time.Duration {
+	if cfg == nil {
+		return config.DefaultDownloadTimeout
+	}
+	// the timeout specified by user should be used firstly
+	if cfg.Timeout > 0 {
+		return cfg.Timeout
+	}
+	timeout := netutils.CalculateTimeout(cfg.RV.FileLength, cfg.MinRate,
+		config.DefaultMinRate, 10*time.Second)
+	if timeout > 0 {
+		return timeout
+	}
+	return config.DefaultDownloadTimeout
+}
diff --git a/dfget/core/downloader/downloader.go b/dfget/core/downloader/downloader.go
index 29503c817..85fbbe673 100644
--- a/dfget/core/downloader/downloader.go
+++ b/dfget/core/downloader/downloader.go
@@ -42,8 +42,9 @@ type Downloader interface {
 // the given timeout duration.
 func DoDownloadTimeout(downloader Downloader, timeout time.Duration) error {
 	if timeout <= 0 {
-		logrus.Warnf("invalid download timeout(%.3fs)", timeout.Seconds())
-		timeout = config.DefaultDownlodTimeout
+		logrus.Warnf("invalid download timeout(%.3fs), use default:(%.3fs)",
+			timeout.Seconds(), config.DefaultDownloadTimeout.Seconds())
+		timeout = config.DefaultDownloadTimeout
 	}
 	ctx, cancel := context.WithCancel(context.Background())