diff --git a/creating_concepts.htm b/creating_concepts.htm
index 55fa8d7..f6d749b 100644
--- a/creating_concepts.htm
+++ b/creating_concepts.htm
@@ -73,7 +73,6 @@ enforce the associated types of the concept.
       n = i - j;
       i[n];
     }
-    Iter a, b;
     Iter i, j;
     typename std::iterator_traits<Iter>::difference_type n;
   };