diff --git a/asdf.lisp b/asdf.lisp
index 5c4703886767fbac2e88f76b1f235fc0d40f8528..c1246ad3d3c5de5d309b8e74de5dba9b1d47dbec 100644
--- a/asdf.lisp
+++ b/asdf.lisp
@@ -190,7 +190,7 @@
   ;; This parameter isn't actually user-visible
   ;; -- please use the exported function ASDF:ASDF-VERSION below.
   ;; the 1+ hair is to ensure that we don't do an inadvertent find and replace
-  (subseq "VERSION:1.608" (1+ (length "VERSION"))))
+  (subseq "VERSION:1.609" (1+ (length "VERSION"))))
 
 (defun asdf-version ()
   "Exported interface to the version of ASDF currently installed. A string.