diff --git a/admin.go b/admin.go
index 52388c76..64d7fe34 100644
--- a/admin.go
+++ b/admin.go
@@ -468,6 +468,6 @@ func (admin *adminApp) Run() {
 		err = http.ListenAndServe(addr, nil)
 	}
 	if err != nil {
-		BeeLogger.Critical("Admin ListenAndServe: ", err, fmt.Sprint(os.Getpid()))
+		BeeLogger.Critical("Admin ListenAndServe: ", err, fmt.Sprintf("%d", os.Getpid()))
 	}
 }
diff --git a/app.go b/app.go
index 6c1eeab6..8fc320ad 100644
--- a/app.go
+++ b/app.go
@@ -93,7 +93,7 @@ func (app *App) Run() {
 					server.Server = app.Server
 					err := server.ListenAndServeTLS(HttpCertFile, HttpKeyFile)
 					if err != nil {
-						BeeLogger.Critical("ListenAndServeTLS: ", err)
+						BeeLogger.Critical("ListenAndServeTLS: ", err, fmt.Sprintf("%d", os.Getpid()))
 						time.Sleep(100 * time.Microsecond)
 						endRunning <- true
 					}
@@ -108,7 +108,7 @@ func (app *App) Run() {
 					}
 					err := server.ListenAndServe()
 					if err != nil {
-						BeeLogger.Critical("ListenAndServe: ", err, fmt.Sprint(os.Getpid()))
+						BeeLogger.Critical("ListenAndServe: ", err, fmt.Sprintf("%d", os.Getpid()))
 						time.Sleep(100 * time.Microsecond)
 						endRunning <- true
 					}