diff --git a/asdf.asd b/asdf.asd
index d16a3d164f48d3adb6bc1f40f9431871b82aeb39..4ba5ec77f26eb425455ccf3afee5873274fdd383 100644
--- a/asdf.asd
+++ b/asdf.asd
@@ -74,7 +74,7 @@
   :licence "MIT"
   :description "Another System Definition Facility"
   :long-description "ASDF builds Common Lisp software organized into defined systems."
-  :version "2.32.36" ;; to be automatically updated by make bump-version
+  :version "2.32.37" ;; to be automatically updated by make bump-version
   :depends-on ()
   #+asdf3 :encoding #+asdf3 :utf-8
   ;; For most purposes, asdf itself specially counts as a builtin system.
diff --git a/bundle.lisp b/bundle.lisp
index 568f894fe9fc85d1b17f78915c941c1cbd23ffb2..24fbf907f06498bae117dc491c7754c8b4394e6d 100644
--- a/bundle.lisp
+++ b/bundle.lisp
@@ -185,7 +185,7 @@
       (or #+ecl (or (equalp type (compile-file-type :type :object))
                     (equalp type (compile-file-type :type :static-library)))
           #+mkcl (equalp type (compile-file-type :fasl-p nil))
-          #+(or allegro clisp clozure cmu lispworks sbcl scl xcl) (equalp type (compile-file-type)))))
+          #+(or abcl allegro clisp clozure cmu lispworks sbcl scl xcl) (equalp type (compile-file-type)))))
 
   (defgeneric* (trivial-system-p) (component))
 
diff --git a/header.lisp b/header.lisp
index 3f2c8e20f30973a3b941a4e9e2fce710414c281e..c70563d9dc7870c0975c886ca05a1767325bbf53 100644
--- a/header.lisp
+++ b/header.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp -*-
-;;; This is ASDF 2.32.36: Another System Definition Facility.
+;;; This is ASDF 2.32.37: Another System Definition Facility.
 ;;;
 ;;; Feedback, bug reports, and patches are all welcome:
 ;;; please mail to <asdf-devel@common-lisp.net>.
diff --git a/uiop/lisp-build.lisp b/uiop/lisp-build.lisp
index e2e376db05afb83407543218d1536f7e76a19f72..789f6d1aab7c15e9cd3167663dea816e43ca8e35 100644
--- a/uiop/lisp-build.lisp
+++ b/uiop/lisp-build.lisp
@@ -669,11 +669,12 @@ it will filter them appropriately."
 ;;; Links FASLs together
 (with-upgradability ()
   (defun combine-fasls (inputs output)
-    #-(or allegro clisp clozure cmu lispworks sbcl scl xcl)
+    #-(or abcl allegro clisp clozure cmu lispworks sbcl scl xcl)
     (error "~A does not support ~S~%inputs ~S~%output  ~S"
            (implementation-type) 'combine-fasls inputs output)
-    #+clozure (ccl:fasl-concatenate output inputs :if-exists :supersede)
+    #+abcl (funcall 'sys::concatenate-fasls inputs output) ; requires ABCL 1.2.0
     #+(or allegro clisp cmu sbcl scl xcl) (concatenate-files inputs output)
+    #+clozure (ccl:fasl-concatenate output inputs :if-exists :supersede)
     #+lispworks
     (let (fasls)
       (unwind-protect
diff --git a/upgrade.lisp b/upgrade.lisp
index 6fdc0c2a1d405a777f7d9d4a0bfe5f203ed02513..15082a6f17fe6fad03fb82a47e0c9401fc3f679f 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -52,7 +52,7 @@ You can compare this string with e.g.: (ASDF:VERSION-SATISFIES (ASDF:ASDF-VERSIO
          ;; "3.4.5.67" would be a development version in the official upstream of 3.4.5.
          ;; "3.4.5.0.8" would be your eighth local modification of official release 3.4.5
          ;; "3.4.5.67.8" would be your eighth local modification of development version 3.4.5.67
-         (asdf-version "2.32.36")
+         (asdf-version "2.32.37")
          (existing-version (asdf-version)))
     (setf *asdf-version* asdf-version)
     (when (and existing-version (not (equal asdf-version existing-version)))
diff --git a/version.lisp-expr b/version.lisp-expr
index a883aeadff9c60b8086a6dc38ea92722c4165051..af7ee546c3358c87ff964fbe3fcfa2497fc488eb 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1 +1 @@
-"2.32.36"
+"2.32.37"