diff --git a/README.md b/README.md
index ab911d9..952c9cf 100644
--- a/README.md
+++ b/README.md
@@ -70,12 +70,15 @@ The iterators returned by `begin()`, `end()`, `begin() const`, `end() const`,
 after the logical last element. (i.e., they wrap around if they reach the end of
 the underlying container)
 
+`basic_ring_buffer` fulfills its own template parameter requirements.
+
 #### Template parameter requirements
 
 The parameter `Container` needs to have member types `value_type` and
 `size_type`, and methods `size_type size() const`, `iterator begin()`,
 `iterator end()`, `const_iterator cbegin() const`, and `const_iterator cend()
-const`, as well as an overloaded `value_type& operator[](size_type)`.
+const`, as well as an overloaded `value_type& operator[](size_type)` and `const
+value_type& operator[](size_type) const)`.
 
 The iterators returned by the container need to be random access iterators.
 
diff --git a/include/ring-buffer.h b/include/ring-buffer.h
index 6cf6d70..ee85626 100644
--- a/include/ring-buffer.h
+++ b/include/ring-buffer.h
@@ -27,6 +27,17 @@ public:
     basic_ring_buffer& operator=(const basic_ring_buffer& other) = default;
     basic_ring_buffer& operator=(basic_ring_buffer&& other) = default;
 
+    CONSTEXPR size_type size() const NOEXCEPT {
+        return container.size();
+    }
+
+    CONSTEXPR value_type& operator[](size_type size) COND_NOEXCEPT(noexcept(container[size])) {
+        return container[size];
+    }
+    CONSTEXPR const value_type& operator[](size_type size) const COND_NOEXCEPT(noexcept(container[size])) {
+        return container[size];
+    }
+
     CONSTEXPR Container& buffer() NOEXCEPT {
         return container;
     }