diff --git a/CHANGELOG.md b/CHANGELOG.md
index 243ae321..33ddd5d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@ Version 169:
 * Use buffers_to_string in tests
 * Use boost::void_t
 * Refactor HTTP write_op implementation
+* Use fully qualified namespace in BOOST_BEAST_HANDLER_INIT
 
 --------------------------------------------------------------------------------
 
diff --git a/include/boost/beast/core/detail/type_traits.hpp b/include/boost/beast/core/detail/type_traits.hpp
index 8bc5a869..3d379846 100644
--- a/include/boost/beast/core/detail/type_traits.hpp
+++ b/include/boost/beast/core/detail/type_traits.hpp
@@ -461,7 +461,7 @@ buffers_range(Buffers const& buffers)
     expected by the initiating function,
 */
 #define BOOST_BEAST_HANDLER_INIT(type, sig) \
-    static_assert(is_completion_handler< \
+    static_assert(boost::beast::is_completion_handler< \
     BOOST_ASIO_HANDLER_TYPE(type, sig), sig>::value, \
     "CompletionHandler signature requirements not met"); \
     boost::asio::async_completion<type, sig> init{handler}