diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index 7fbfae7..6afc867 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -581,7 +581,7 @@
 value in the mapping that corresponds to that key.  (The expression list is a
 tuple except if it has exactly one item.)
 
-If the primary is a sequence, the expression (list) must evaluate to a plain
+If the primary is a sequence, the expression list must evaluate to a plain
 integer.  If this value is negative, the length of the sequence is added to it
 (so that, e.g., ``x[-1]`` selects the last item of ``x``.)  The resulting value
 must be a nonnegative integer less than the number of items in the sequence, and