diff --git a/modules/twain_user/HGTwainImpl.cpp b/modules/twain_user/HGTwainImpl.cpp
index dd4ce46c..4c54fd25 100644
--- a/modules/twain_user/HGTwainImpl.cpp
+++ b/modules/twain_user/HGTwainImpl.cpp
@@ -237,6 +237,11 @@ HGResult HGTwainDSMImpl::CreateSelectedDSEx(class HGTwainDSImpl** dsImpl)
 
     std::string sourceName = getCfgValue("twain", "source", std::string(""));
 
+    if (m_vds.empty())
+    {
+        return HGBASE_ERR_FAIL;
+    }
+
     TW_IDENTITY selectDS;
     memset(&selectDS, 0, sizeof(TW_IDENTITY));
     if (-2 == show_twain_srclist_ui(&m_vds[0], m_vds.size(), sourceName.c_str(), m_hWnd, &selectDS))