diff --git a/asdf.asd b/asdf.asd
index 346f2f66478b0c20d8a7d646f24f9df7942549d8..62f13e3f0886c77748874acf1ec579ba672e0e51 100644
--- a/asdf.asd
+++ b/asdf.asd
@@ -14,7 +14,7 @@
   :licence "MIT"
   :description "Another System Definition Facility"
   :long-description "ASDF builds Common Lisp software organized into defined systems."
-  :version "2.20.15" ;; to be automatically updated by bin/bump-revision
+  :version "2.20.16" ;; to be automatically updated by bin/bump-revision
   :depends-on ()
   :components
   ((:file "asdf")
diff --git a/asdf.lisp b/asdf.lisp
index 6ddee2b484ef1926ef2bc06efc3f6eb051660355..ea865d0dace163ffd33e3341a635617598f8dbb8 100644
--- a/asdf.lisp
+++ b/asdf.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp ; coding: utf-8 -*-
-;;; This is ASDF 2.20.15: Another System Definition Facility.
+;;; This is ASDF 2.20.16: Another System Definition Facility.
 ;;;
 ;;; Feedback, bug reports, and patches are all welcome:
 ;;; please mail to <asdf-devel@common-lisp.net>.
@@ -116,7 +116,7 @@
          ;; "2.345.6" would be a development version in the official upstream
          ;; "2.345.0.7" would be your seventh local modification of official release 2.345
          ;; "2.345.6.7" would be your seventh local modification of development version 2.345.6
-         (asdf-version "2.20.15")
+         (asdf-version "2.20.16")
          (existing-asdf (find-class 'component nil))
          (existing-version *asdf-version*)
          (already-there (equal asdf-version existing-version)))
@@ -246,7 +246,7 @@
             #:operation #:compile-op #:load-op #:load-source-op #:test-op
             #:feature #:version #:version-satisfies
             #:upgrade-asdf
-            #:implementation-identifier #:implementation-type
+            #:implementation-identifier #:implementation-type #:hostname
             #:input-files #:output-files #:output-file #:perform
             #:operation-done-p #:explain