diff --git a/include/boost/regex/v5/match_results.hpp b/include/boost/regex/v5/match_results.hpp
index 6b77ea57..eb54e0c3 100644
--- a/include/boost/regex/v5/match_results.hpp
+++ b/include/boost/regex/v5/match_results.hpp
@@ -553,7 +553,7 @@ public:
 
    void  set_named_subs(std::shared_ptr<named_sub_type> subs)
    {
-      m_named_subs = subs;
+      m_named_subs = std::move(subs);
    }
 
 private: