diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 7d0ed40..d892a9a 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -4321,6 +4321,8 @@ int hg_scanner::read_image_data(unsigned char* buf, int* len)
 int hg_scanner::stop(void)
 {
 	int ret = SCANNER_ERR_OK;
+	if (usb_img_index_ == 0)
+		std::this_thread::sleep_for(std::chrono::milliseconds(500));//BUG-801
 
 	user_cancel_ = true;
 	ret = do_stop();