diff --git a/src/device/DeviceManager.cpp b/src/device/DeviceManager.cpp
index 645e296..b23ef0f 100644
--- a/src/device/DeviceManager.cpp
+++ b/src/device/DeviceManager.cpp
@@ -180,6 +180,7 @@ void DeviceManager::initDevice() {
 				qDebug() << "Preview data response event end!";
 			}
 			else{
+			    lastStatus = READY;
                 previewing = false;
 			    QThread::sleep(3);
 			}