diff --git a/include/boost/algorithm/string.hpp b/include/boost/algorithm/string.hpp
index a2f943e..0771517 100644
--- a/include/boost/algorithm/string.hpp
+++ b/include/boost/algorithm/string.hpp
@@ -21,6 +21,7 @@
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/algorithm/string/find.hpp>
 #include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/join.hpp>
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/erase.hpp>
 #include <boost/algorithm/string/classification.hpp>