diff --git a/modules/twainui/hg_settingdialog.cpp b/modules/twainui/hg_settingdialog.cpp
index c6846097..afae8201 100644
--- a/modules/twainui/hg_settingdialog.cpp
+++ b/modules/twainui/hg_settingdialog.cpp
@@ -1290,6 +1290,22 @@ void hg_settingdialog::slot_string_list_comboBoxClicked()
         }
     }
 
+    if (0 == strcmp(opt->name, SANE_STD_OPT_NAME_SCAN_MODE))
+    {
+        if (comboBox->currentText() == OPTION_VALUE_SMZS_SMZDZS)
+        {
+            SANE_Int scanCount = 0;
+            int scan_count_id = 0;
+            find_option_description(SANE_STD_OPT_NAME_SCAN_COUNT, &scan_count_id);
+            SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, scan_count_id, SANE_ACTION_GET_VALUE, &scanCount, &method);
+            if (scanCount < 2)
+            {
+                SANE_Int value = 1;
+                ret = m_saneAPI.sane_control_option_api(m_devHandle, scan_count_id, SANE_ACTION_SET_VALUE, &value, &method);
+            }
+        }
+    }
+
     updateRestorePushButton();
 }