diff --git a/config/config.go b/config/config.go
index b4abf936..eb6e604a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -265,20 +265,22 @@ func (c *Config) Validate() error {
 // Sanitize sanitizes the given configuration.
 // It returns an error if there is something very bad in the configuration.
 func (c *Config) Sanitize() error {
-	if c.Logger == nil {
-		if c.LogOutput == nil {
-			c.LogOutput = os.Stderr
-		}
-		if c.LogLevel == "" {
-			c.LogLevel = DefaultLogLevel
-		}
-		c.Logger = log.New(c.LogOutput, "", log.LstdFlags)
+	if c.LogOutput == nil {
+		c.LogOutput = os.Stderr
+	}
+
+	if c.LogLevel == "" {
+		c.LogLevel = DefaultLogLevel
 	}
 
 	if c.LogVerbosity <= 0 {
 		c.LogVerbosity = DefaultLogVerbosity
 	}
 
+	if c.Logger == nil {
+		c.Logger = log.New(c.LogOutput, "", log.LstdFlags)
+	}
+
 	if c.Hasher == nil {
 		c.Hasher = hasher.NewDefaultHasher()
 	}
diff --git a/olric.go b/olric.go
index bf425cd8..cd243e52 100644
--- a/olric.go
+++ b/olric.go
@@ -184,7 +184,7 @@ func New(c *config.Config) (*Olric, error) {
 	filter := &logutils.LevelFilter{
 		Levels:   []logutils.LogLevel{"DEBUG", "WARN", "ERROR", "INFO"},
 		MinLevel: logutils.LogLevel(strings.ToUpper(c.LogLevel)),
-		Writer:   c.LogOutput,
+		Writer:   c.Logger.Writer(),
 	}
 	c.Logger.SetOutput(filter)
 
diff --git a/pkg/flog/flog.go b/pkg/flog/flog.go
index e689d75b..b534d4c0 100644
--- a/pkg/flog/flog.go
+++ b/pkg/flog/flog.go
@@ -97,7 +97,7 @@ func (f *Logger) V(level int32) Verbose {
 	}
 }
 
-// Enabled will return true if this log level is enabled, guarded by the value of verbosity level.
+// Ok will return true if this log level is enabled, guarded by the value of verbosity level.
 func (v Verbose) Ok() bool {
 	return v.ok
 }
@@ -116,7 +116,7 @@ func (v Verbose) Printf(format string, i ...interface{}) {
 	}
 }
 
-// Printf calls v.f.logger.Println to print to the logger.
+// Println calls v.f.logger.Println to print to the logger.
 // Arguments are handled in the manner of fmt.Println.
 func (v Verbose) Println(i ...interface{}) {
 	if !v.ok {