diff --git a/src/Limonp/StdExtension.hpp b/src/Limonp/StdExtension.hpp
index e7d974c..00cb7d1 100644
--- a/src/Limonp/StdExtension.hpp
+++ b/src/Limonp/StdExtension.hpp
@@ -3,7 +3,10 @@
 
 #include <map>
 
-#if(__cplusplus == 201103L)
+#ifdef __APPLE__
+#include <unordered_map>
+#include <unordered_set>
+#elif(__cplusplus == 201103L)
 #include <unordered_map>
 #include <unordered_set>
 #else