diff --git a/reference.htm b/reference.htm
index 48d858f..c8ba256 100644
--- a/reference.htm
+++ b/reference.htm
@@ -57,11 +57,14 @@
 
 <pre>
   template &lt;class T&gt;
-  struct Integer_concept; // Is T a built-in integer type?
+  struct IntegerConcept; // Is T a built-in integer type?
 
   template &lt;class T&gt;
   struct SignedIntegerConcept; // Is T a built-in signed integer type?
 
+  template &lt;class T&gt;
+  struct UnsignedIntegerConcept; // Is T a built-in unsigned integer type?
+
   template &lt;class X, class Y&gt;
   struct ConvertibleConcept; // Is X convertible to Y?