diff --git a/compiler/generic/vm-macs.lisp b/compiler/generic/vm-macs.lisp
index 485cb0d9587c7ab6da891d4a3201c5c4887d9773..bffe54f77818a638ee0326fbf2c63b01345671fc 100644
--- a/compiler/generic/vm-macs.lisp
+++ b/compiler/generic/vm-macs.lisp
@@ -7,7 +7,7 @@
 ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
 ;;;
 (ext:file-comment
-  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/generic/vm-macs.lisp,v 1.9 1992/12/16 13:34:19 wlott Exp $")
+  "$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/generic/vm-macs.lisp,v 1.10 1992/12/16 18:11:02 wlott Exp $")
 ;;;
 ;;; **********************************************************************
 ;;;
@@ -120,7 +120,8 @@
 	  (error "No more slots can follow a :rest-p slott."))
 	(destructuring-bind
 	    (slot-name &rest options
-		       &key docs rest-p (length 1) ((:type slot-type)) init
+		       &key docs rest-p (length (if rest-p 0 1))
+		       ((:type slot-type)) init
 		       (ref-known nil ref-known-p) ref-trans
 		       (set-known nil set-known-p) set-trans
 		       &allow-other-keys)