diff --git a/sane/scanner.cpp b/sane/scanner.cpp
index c5ad8bb..b7632bf 100644
--- a/sane/scanner.cpp
+++ b/sane/scanner.cpp
@@ -2926,6 +2926,18 @@ COM_API_IMPLEMENT(scanner, bool, get_option_info(int sn, value_type* type, value
 										\
 		return true;					\
 	}
+#define SIMPLE_BOOL_INFO(id, rdo)				\
+	if (sn == id)						\
+	{									\
+		if (type)						\
+			*type = VAL_TYPE_BOOL;		\
+		if (limit)						\
+			*limit = rdo ? VAL_LIMIT_READONLY : VAL_LIMIT_NONE;	\
+		if (bytes)						\
+			*bytes = sizeof(int);		\
+										\
+		return true;					\
+	}
 
 		
 	SIMPLE_STR_INFO(SANE_OPT_ID_DRIVER_VERSION, true);
@@ -2951,6 +2963,7 @@ COM_API_IMPLEMENT(scanner, bool, get_option_info(int sn, value_type* type, value
 	SIMPLE_INT_INFO(SANE_OPT_ID_PID, true);
 	SIMPLE_INT_INFO(SANE_OPT_ID_ROLLER_LIFE, true);
 	SIMPLE_STR_INFO(SANE_OPT_ID_INITIAL_BOOT_TIME, true);
+	SIMPLE_BOOL_INFO(SANE_OPT_ID_LENS_DIRTY, false);
 
 	sn = transfer_id(sn);
 	if (sn == -1)
diff --git a/twain/twain/huagaods.cpp b/twain/twain/huagaods.cpp
index bb7d26c..bab02c9 100644
--- a/twain/twain/huagaods.cpp
+++ b/twain/twain/huagaods.cpp
@@ -3530,7 +3530,8 @@ void huagao_ds::init_support_caps_ex(void)
 	ADD_SANE_CAP(FOLD_TYPE);
 	ADD_SANE_CAP(COLOR_CORRECTION);
 	ADD_SANE_CAP(DISCARDBLANK);
-	
+	ADD_SANE_CAP(LENS_DIRTY);
+
 #define GET_ONLY_CAP(name, ctype, ttype)																\
 	m_query[(CapType)SANE_OPT_ID_##name] = MsgSupport::GetCurrent;										\
 	m_caps[(CapType)SANE_OPT_ID_##name] = [this](Msg msg, Capability& data) -> Result {					\