diff --git a/include/boost/container_hash/hash_fwd.hpp b/include/boost/container_hash/hash_fwd.hpp
index 489fdd2..32388ac 100644
--- a/include/boost/container_hash/hash_fwd.hpp
+++ b/include/boost/container_hash/hash_fwd.hpp
@@ -18,6 +18,7 @@ template<class T> struct is_range;
 template<class T> struct is_contiguous_range;
 template<class T> struct is_unordered_range;
 template<class T> struct is_described_class;
+template<class T> struct is_tuple_like;
 
 } // namespace container_hash