diff --git a/doc/syntax/refinements.rdoc b/doc/syntax/refinements.rdoc
index 1a516ed8b2..62405a78b7 100644
--- a/doc/syntax/refinements.rdoc
+++ b/doc/syntax/refinements.rdoc
@@ -42,7 +42,7 @@ Activate the refinement with #using:
 
   using M
 
-  x = C.new
+  c = C.new
 
   c.foo # prints "C#foo in M"