diff --git a/pep-0435.txt b/pep-0435.txt
index 4dde8648d..f5af108b9 100644
--- a/pep-0435.txt
+++ b/pep-0435.txt
@@ -568,9 +568,9 @@ common values in derived classes are identical (a singleton model).  While PEP
 354 dismisses this approach for its complexity, in practice any perceived
 complexity, though minimal, is hidden from users of the enumeration.
 
-Unlike PEP 354, enumeration values can only be tested by identity comparison.
-This is to emphasize the fact that enumeration values are singletons, much
-like ``None``.
+Unlike PEP 354, enumeration values should only be tested by identity
+comparison.  This is to emphasize the fact that enumeration values are
+singletons, much like ``None``.
 
 
 Acknowledgments