diff --git a/main.cpp b/main.cpp
index fd7b3bd..b84cddc 100644
--- a/main.cpp
+++ b/main.cpp
@@ -95,7 +95,7 @@ std::vector<std::string> get_search_paths(const std::string& strFileName, int nB
 
 std::vector<long long> get_file_timestamp_range(const std::string& strFileName, int nBeginTime, int nEndTime)
 {
-    std::vector<std::string> vs;
+    std::vector<long long> vs;
     if (strFileName.empty() || nBeginTime > nEndTime)
     {
         return vs;