diff --git a/pep-0440.txt b/pep-0440.txt
index 9317e8028..7215cd476 100644
--- a/pep-0440.txt
+++ b/pep-0440.txt
@@ -178,7 +178,7 @@ an epoch identifier is termed a "final release".
 The release segment consists of one or more non-negative integer
 values, separated by dots::
 
-    N[.N]+
+    N(.N)*
 
 Final releases within a project MUST be numbered in a consistently
 increasing fashion, otherwise automated tools will not be able to upgrade