diff --git a/src/Limonp/StdExtension.hpp b/src/Limonp/StdExtension.hpp
index 00cb7d1..b3c5447 100644
--- a/src/Limonp/StdExtension.hpp
+++ b/src/Limonp/StdExtension.hpp
@@ -9,6 +9,9 @@
 #elif(__cplusplus == 201103L)
 #include <unordered_map>
 #include <unordered_set>
+#elif defined _MSC_VER
+#include <unordered_map>
+#include <unordered_set>
 #else
 #include <tr1/unordered_map>
 #include <tr1/unordered_set>