diff --git a/pep-0004.txt b/pep-0004.txt
index bc4946487..107c2621c 100644
--- a/pep-0004.txt
+++ b/pep-0004.txt
@@ -182,6 +182,12 @@ Deprecated modules
     Date:          21-Feb-2006
     Documentation: Documented as deprecated as of Python 2.5.
 
+    Module name:   sets
+    Rationale:     The built-in set/frozenset types, introduced in
+                   Python 2.4, supplant the module.
+    Date:          12-Jan-2007
+    Documentation: Documented as deprecated as of Python 2.6.
+
 
 Undeprecated modules