--- a/lib/base/object.hpp
+++ b/lib/base/object.hpp
@@ -23,6 +23,7 @@
 #include "base/i2-base.hpp"
 #include "base/debug.hpp"
 #include <boost/smart_ptr/intrusive_ptr.hpp>
+#include <cstdint>
 #include <vector>
 
 using boost::intrusive_ptr;
