diff --git a/hub/api/api.go b/hub/api/api.go
index 2f1e2ea..01ef689 100644
--- a/hub/api/api.go
+++ b/hub/api/api.go
@@ -80,8 +80,8 @@ func (a *API) Config_Get() (*Config, error) {
 }
 
 func (a *API) Config_Update(conf *Config) error {
-	a.sessionsMu.Lock()
-	defer a.sessionsMu.Unlock()
+	a.lock.Lock()
+	defer a.lock.Unlock()
 	return errs.DB(db.Config_Update(a.db, conf))
 }