diff --git a/asdf.lisp b/asdf.lisp
index 26e04b367569a170a72311ba77aa3faa255d9c1f..03025fb016ecb51581826cede9c89e1b6a1e879e 100644
--- a/asdf.lisp
+++ b/asdf.lisp
@@ -173,7 +173,7 @@
 ;;;;
 (defparameter *asdf-revision*
   ;; the 1+ hair is to ensure that we don't do an inadvertent find and replace
-  (subseq "REVISION:1.375" (1+ (length "REVISION"))))
+  (subseq "REVISION:1.500" (1+ (length "REVISION"))))
 
 (defvar *resolve-symlinks* t
   "Determine whether or not ASDF resolves symlinks when defining systems.