diff --git a/gtsam/base/FastVector.h b/gtsam/base/FastVector.h
index 0a4932e01..7d1cb970c 100644
--- a/gtsam/base/FastVector.h
+++ b/gtsam/base/FastVector.h
@@ -20,6 +20,7 @@
 
 #include <gtsam/base/FastDefaultAllocator.h>
 #include <boost/serialization/nvp.hpp>
+#include <boost/serialization/vector.hpp>
 #include <vector>
 
 namespace gtsam {