diff --git a/src/device/DeviceManager.cpp b/src/device/DeviceManager.cpp
index d86f31d..43fb04e 100644
--- a/src/device/DeviceManager.cpp
+++ b/src/device/DeviceManager.cpp
@@ -153,7 +153,6 @@ void DeviceManager::initDevice() {
         while (!endLoop)
         {
             if (!previewing) {
-                qDebug()<<"Preview data reader long sleep!";
                 QThread::sleep(3);
                 continue;
             }