diff --git a/power/Vcd.hh b/power/Vcd.hh
index 2ebe6ee1..dbe45056 100644
--- a/power/Vcd.hh
+++ b/power/Vcd.hh
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <vector>
 #include <map>