diff --git a/include/boost/unordered/detail/foa.hpp b/include/boost/unordered/detail/foa.hpp
index c5045685..f22f8bf6 100644
--- a/include/boost/unordered/detail/foa.hpp
+++ b/include/boost/unordered/detail/foa.hpp
@@ -1119,7 +1119,7 @@ public:
     return emplace_impl(value_from(std::forward<T>(x)));
   }
 
-  BOOST_FORCEINLINE std::pair<iterator,bool> insert(init_type&& x)
+  BOOST_FORCEINLINE std::pair<iterator,bool> insert(/*init_type*/value_type&& x)
   {
     return emplace_impl(std::move(x));
   }