diff --git a/vespalib/src/vespa/vespalib/util/memory.h b/vespalib/src/vespa/vespalib/util/memory.h
index 312b1c010ae6..2f03441dda0a 100644
--- a/vespalib/src/vespa/vespalib/util/memory.h
+++ b/vespalib/src/vespa/vespalib/util/memory.h
@@ -2,9 +2,10 @@
 
 #pragma once
 
-#include <memory>
-#include <cstring>
 #include <cstdlib>
+#include <cstring>
+#include <memory>
+#include <type_traits>
 
 /// Macro to give you number of elements in a defined array.
 #define VESPA_NELEMS(a)    (sizeof(a)/sizeof(a[0]))