diff --git a/src/util/tptr.h b/src/util/tptr.h
index 2a35af535..50e9417fe 100644
--- a/src/util/tptr.h
+++ b/src/util/tptr.h
@@ -19,6 +19,7 @@ Revision History:
 
 #pragma once
 
+#include <cstdint>
 #include "util/machine.h"
 #include <cstdint>