diff --git a/contrib/eos_portable_archive/eos/portable_iarchive.hpp b/contrib/eos_portable_archive/eos/portable_iarchive.hpp
index 5d34b1d1..6f60c93d 100644
--- a/contrib/eos_portable_archive/eos/portable_iarchive.hpp
+++ b/contrib/eos_portable_archive/eos/portable_iarchive.hpp
@@ -119,6 +119,7 @@
 // Boost 1.69 (Spirit.X2/X3) has dropped their own FP routines in favor of boost::math
 #elif BOOST_VERSION < 106900
 #include <boost/spirit/home/support/detail/math/fpclassify.hpp>
+#include <boost/spirit/home/support/detail/endian/endian.hpp>
 #else
 #include <boost/spirit/home/support/detail/endian/endian.hpp>
 #endif
diff --git a/contrib/eos_portable_archive/eos/portable_oarchive.hpp b/contrib/eos_portable_archive/eos/portable_oarchive.hpp
index ca94858b..20d4c29c 100644
--- a/contrib/eos_portable_archive/eos/portable_oarchive.hpp
+++ b/contrib/eos_portable_archive/eos/portable_oarchive.hpp
@@ -122,6 +122,7 @@
 // Boost 1.69 (Spirit.X2/X3) has dropped their own FP routines in favor of boost::math
 #elif BOOST_VERSION < 106900
 #include <boost/spirit/home/support/detail/math/fpclassify.hpp>
+#include <boost/spirit/home/support/detail/endian/endian.hpp>
 #else
 #include <boost/spirit/home/support/detail/endian/endian.hpp>
 #endif