diff --git a/v4/memory_Context.cpp b/v4/memory_Context.cpp
index ca5ff09..c8f041e 100644
--- a/v4/memory_Context.cpp
+++ b/v4/memory_Context.cpp
@@ -1,3 +1,4 @@
+#include <utility>
 #include "any.h"
 #include "memory_Context.h"