diff --git a/pkg/rubik/servicemanager.go b/pkg/rubik/servicemanager.go
index ba63b180ad1d36e6b333bba50ae00443ef8ed979..89bb121157cd21c8d80f0b9733158602404eb5ea 100644
--- a/pkg/rubik/servicemanager.go
+++ b/pkg/rubik/servicemanager.go
@@ -153,6 +153,7 @@ func (manager *ServiceManager) Setup(v api.Viewer) error {
 
 	var preStarted = make(map[string]services.Service, 0)
 	manager.RLock()
+	defer manager.RUnlock()
 	for name, s := range manager.RunningServices {
 		/*
 			Try to prestart the service. If any service fails, rubik exits
@@ -165,7 +166,7 @@ func (manager *ServiceManager) Setup(v api.Viewer) error {
 		preStarted[name] = s
 		log.Infof("service %v pre-start successfully", name)
 	}
-	manager.RUnlock()
+
 	return nil
 }