diff --git a/pep-0398.txt b/pep-0398.txt
index cc4de2666..e574d33bd 100644
--- a/pep-0398.txt
+++ b/pep-0398.txt
@@ -69,6 +69,7 @@ Implemented / Final PEPs:
 * PEP 417: Including mock in the Standard Library
 * PEP 418: Add monotonic time, performance counter, and process time functions
 * PEP 420: Implicit Namespace Packages
+* PEP 421: Adding sys.implementation
 * PEP 3118: Revising the buffer protocol (protocol semantics finalised)
 * PEP 3144: IP Address manipulation library
 * PEP 3151: Reworking the OS and IO exception hierarchy
@@ -87,7 +88,6 @@ Candidate PEPs:
 * PEP 362: Function Signature Object
 * PEP 397: Python launcher for Windows
 * PEP 405: Python Virtual Environments
-* PEP 421: Adding sys.implementation
 * PEP 3143: Standard daemon process library
 * PEP 3154: Pickle protocol version 4