diff --git a/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp b/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp
index f456d69..6c29ff4 100644
--- a/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp
+++ b/hgdriver/wrapper/huagaoxxx_warraper_ex.cpp
@@ -250,6 +250,7 @@ extern "C"
 		RETURN_IF(err, SCANNER_ERR_DEVICE_ISLOCK);
 		RETURN_IF(err, SCANNER_ERR_DEVICE_MAYBE_IS_HOLE);
 		RETURN_IF(err, SCANNER_ERR_DEVICE_DEVS_BOOTING);
+		RETURN_IF(err, SCANNER_ERR_DEVICE_UNKNOWN_STATUS);
 
 		if (err == SCANNER_ERR_LANG_PAK_LOST)
 			return "SCANNER_ERR_LANG_PAK_LOST";
@@ -322,6 +323,7 @@ extern "C"
 		RETURN_DESC_IF(err, SCANNER_ERR_DEVICE_ISLOCK);
 		RETURN_DESC_IF(err, SCANNER_ERR_DEVICE_MAYBE_IS_HOLE);
 		RETURN_DESC_IF(err, SCANNER_ERR_DEVICE_DEVS_BOOTING);
+		RETURN_DESC_IF(err, SCANNER_ERR_DEVICE_UNKNOWN_STATUS);
 		if (err == SCANNER_ERR_LANG_PAK_LOST)
 			return "SCANNER_ERR_LANG_PAK_LOST";