diff --git a/compiler/generic/vm-fndb.lisp b/compiler/generic/vm-fndb.lisp
index 261925b0cc8092ff19037985a6e396a1f624e3ec..75553040697f7c8befc8a8e1dc6e4a0a166fb9f0 100644
--- a/compiler/generic/vm-fndb.lisp
+++ b/compiler/generic/vm-fndb.lisp
@@ -7,7 +7,7 @@
 ;;; Scott Fahlman (FAHLMAN@CMUC). 
 ;;; **********************************************************************
 ;;;
-;;; $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/generic/vm-fndb.lisp,v 1.1 1990/03/27 21:01:52 wlott Exp $
+;;; $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/generic/vm-fndb.lisp,v 1.2 1990/03/29 21:32:30 wlott Exp $
 ;;;
 ;;; This file defines the machine specific function signatures.
 ;;;
@@ -15,6 +15,9 @@
 ;;;
 (in-package "C")
 
+(import '(lisp::%raw-bits lisp::simple-array-p))
+
+
 
 ;;;; Internal type predicates:
 ;;;
@@ -33,3 +36,10 @@
   (simple-string index index simple-string index index)
   (or index null)
   (foldable flushable))
+
+
+(defknown %raw-bits (t fixnum) (unsigned-byte 16)
+  (foldable flushable))
+(defknown ((setf %raw-bits)) (t fixnum (unsigned-byte 16)) (unsigned-byte 16)
+  (unsafe))
+