diff --git a/core/loadpoint_api.go b/core/loadpoint_api.go
index 83a8889e7..49d991dca 100644
--- a/core/loadpoint_api.go
+++ b/core/loadpoint_api.go
@@ -80,6 +80,8 @@ func (lp *Loadpoint) SetDefaultVehicleRef(ref string) {
 		return
 	}
 
+	lp.log.DEBUG.Println("set default vehicle ref:", ref)
+
 	lp.Lock()
 	defer lp.Unlock()
 	lp.VehicleRef = ref