diff --git a/src/util/tptr.h b/src/util/tptr.h
index 6213b2efa..2a35af535 100644
--- a/src/util/tptr.h
+++ b/src/util/tptr.h
@@ -20,6 +20,7 @@ Revision History:
 #pragma once

 #include "util/machine.h"
+#include <cstdint>

 #define TAG_SHIFT        PTR_ALIGNMENT
 #define ALIGNMENT_VALUE  (1 << PTR_ALIGNMENT)