diff --git a/example/include/ranged_representation.h b/example/include/ranged_representation.h
index 678f650a..0f760c00 100644
--- a/example/include/ranged_representation.h
+++ b/example/include/ranged_representation.h
@@ -24,6 +24,7 @@
 
 #include "validated_type.h"
 #include <mp-units/bits/external/hacks.h>
+#include <mp-units/compat_macros.h>
 #include <algorithm>
 #include <concepts>
 #include <type_traits>
diff --git a/example/include/validated_type.h b/example/include/validated_type.h
index f9a8e516..8be7c1a6 100644
--- a/example/include/validated_type.h
+++ b/example/include/validated_type.h
@@ -23,6 +23,7 @@
 #pragma once
 
 #include <gsl/gsl-lite.hpp>
+#include <mp-units/bits/external/hacks.h>
 #include <mp-units/compat_macros.h>
 #include <ostream>
 #include <utility>