diff --git a/include/boost/beast/websocket/detail/impl_base.hpp b/include/boost/beast/websocket/detail/impl_base.hpp
index 869b166a..92c09b3c 100644
--- a/include/boost/beast/websocket/detail/impl_base.hpp
+++ b/include/boost/beast/websocket/detail/impl_base.hpp
@@ -46,7 +46,7 @@ struct impl_base<true>
     {
         // `true` if current read message is compressed
         bool rd_set = false;
-        std::uint8_t rd_eb_consumed = 0;
+        std::size_t rd_eb_consumed = 0;
 
         zlib::deflate_stream zo;
         zlib::inflate_stream zi;