diff --git a/include/rest_rpc/traits.h b/include/rest_rpc/traits.h
index bc8facc..0093bc5 100644
--- a/include/rest_rpc/traits.h
+++ b/include/rest_rpc/traits.h
@@ -1,6 +1,6 @@
 #pragma once
 #include <functional>
-#include <memory>
+#include <type_traits>
 
 namespace rest_rpc {
 namespace util {