diff --git a/include/boost/beast/websocket/detail/impl_base.hpp b/include/boost/beast/websocket/detail/impl_base.hpp
index b1ee8429..705ce72d 100644
--- a/include/boost/beast/websocket/detail/impl_base.hpp
+++ b/include/boost/beast/websocket/detail/impl_base.hpp
@@ -452,7 +452,7 @@ struct impl_base<false>
         return false;
     }
 
-    bool should_compress(std::size_t n_bytes) const
+    bool should_compress(std::size_t) const
     {
         return false;
     }