diff --git a/gtsam/base/FastSet.h b/gtsam/base/FastSet.h
index 8c23ae9e5..985125d40 100644
--- a/gtsam/base/FastSet.h
+++ b/gtsam/base/FastSet.h
@@ -18,6 +18,7 @@
 
 #pragma once
 
+#include <boost/serialization/library_version_type.hpp>
 #include <boost/serialization/nvp.hpp>
 #include <boost/serialization/set.hpp>
 #include <gtsam/base/FastDefaultAllocator.h>
diff --git a/gtsam/base/serialization.h b/gtsam/base/serialization.h
index 24355c684..e615afe83 100644
--- a/gtsam/base/serialization.h
+++ b/gtsam/base/serialization.h
@@ -25,6 +25,7 @@
 #include <string>
 
 // includes for standard serialization types
+#include <boost/serialization/version.hpp>
 #include <boost/serialization/optional.hpp>
 #include <boost/serialization/shared_ptr.hpp>
 #include <boost/serialization/vector.hpp>