diff --git a/tools/bits2rbt/header.h b/tools/bits2rbt/header.h
index 3c42fb43..f422b742 100644
--- a/tools/bits2rbt/header.h
+++ b/tools/bits2rbt/header.h
@@ -4,6 +4,7 @@
 #include <iostream>
 #include <string>
 #include <vector>
+#include <cstdint>
 
 class Header {
        public: