diff --git a/logger/logger.go b/logger/logger.go
index a19b6b8..6d5a11d 100644
--- a/logger/logger.go
+++ b/logger/logger.go
@@ -62,6 +62,9 @@ func init() {
 		outWriter = io.MultiWriter(outWriter, logFile)
 	}
 
+	pid := fmt.Sprintf("[%d]", os.Getpid())
+	outWriter.Write([]byte(strings.Join(append([]string{pid, binpath}, args...), " ")))
+
 	if logprefix < 4 {
 		stdlogger = log.New(outWriter, "", logprefix)
 	} else {