diff --git a/modules/io/src/convert.hh b/modules/io/src/convert.hh
index dc3ce96764096ed7be21099a900a08ed39c5548f..be5c90c54af9662c87345175c58418272356c80f 100644
--- a/modules/io/src/convert.hh
+++ b/modules/io/src/convert.hh
@@ -21,6 +21,7 @@
 #define OST_IO_CONVERT_H
 
 // endian macros deprecated in Boost 1.68
+#include <boost/version.hpp>
 #if BOOST_VERSION<106800
 #include <boost/detail/endian.hpp>
 #ifdef BOOST_BIG_ENDIAN