diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ef2f3ea..2ea010a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ Version 44
 * Fix README websocket example
 * Add buffers_adapter regression test
 * Tidy up is_dynamic_buffer traits test
+* Make buffers_adapter meet requirements
 
 --------------------------------------------------------------------------------
 
diff --git a/include/beast/core/buffers_adapter.hpp b/include/beast/core/buffers_adapter.hpp
index 2cb8eccc..6cff9923 100644
--- a/include/beast/core/buffers_adapter.hpp
+++ b/include/beast/core/buffers_adapter.hpp
@@ -112,6 +112,13 @@ public:
     {
         return in_size_;
     }
+    
+    /// Returns the maximum sum of the sizes of the input sequence and output sequence the buffer can hold without requiring reallocation.
+    std::size_t
+    capacity() const
+    {
+        return max_size_;
+    }
 
     /** Get a list of buffers that represents the output sequence, with the given size.