diff --git a/app/HGProductionTool/form_maininterface.cpp b/app/HGProductionTool/form_maininterface.cpp
index 2f332eb..1c8f6f1 100644
--- a/app/HGProductionTool/form_maininterface.cpp
+++ b/app/HGProductionTool/form_maininterface.cpp
@@ -884,7 +884,7 @@ void Form_mainInterface::on_pbtn_start_clicked()
         std::string correctData = m_map_title_name.value(title).dynamic_correct_data.toStdString();
         if (!correctData.empty())
         {
-            unsigned int len = sizeof(buf) / sizeof(buf[0]);
+            size_t len = sizeof(buf) / sizeof(buf[0]);
             str_to_wchar(correctData, buf, &len);
         }