diff --git a/test/std/utilities/meta/meta.type.synop/endian.pass.cpp b/test/std/utilities/meta/meta.type.synop/endian.pass.cpp
index 19a919842..c71229caf 100644
--- a/test/std/utilities/meta/meta.type.synop/endian.pass.cpp
+++ b/test/std/utilities/meta/meta.type.synop/endian.pass.cpp
@@ -14,6 +14,7 @@
 #include <type_traits>
 #include <cstring>
 #include <cassert>
+#include <cstdint>
 
 #include "test_macros.h"