remove duplicate target
diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst
index 931f506..fa71870 100644
--- a/Doc/tutorial/datastructures.rst
+++ b/Doc/tutorial/datastructures.rst
@@ -345,7 +345,6 @@
 Referencing the name ``a`` hereafter is an error (at least until another value
 is assigned to it).  We'll find other uses for :keyword:`del` later.
 
-.. _tut-tuples:
 
 .. _tut-tuples: