diff --git a/compiler/mips/system.lisp b/compiler/mips/system.lisp
index 6baa5766155b1abf5bf9d905cfcaf878faca25f4..ccaf7688497bcf485605a2b63e5305bd946db61d 100644
--- a/compiler/mips/system.lisp
+++ b/compiler/mips/system.lisp
@@ -7,7 +7,7 @@
 ;;; Scott Fahlman (FAHLMAN@CMUC). 
 ;;; **********************************************************************
 ;;;
-;;; $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/mips/system.lisp,v 1.30 1990/07/21 16:17:24 wlott Exp $
+;;; $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/mips/system.lisp,v 1.31 1990/09/09 20:39:52 wlott Exp $
 ;;;
 ;;;    MIPS VM definitions of various system hacking operations.
 ;;;
@@ -242,6 +242,14 @@
 ;;;; Other random VOPs.
 
 
+(defknown mach::do-pending-interrupt () (values))
+(define-vop (mach::do-pending-interrupt)
+  (:policy :fast-safe)
+  (:translate mach::do-pending-interrupt)
+  (:generator 1
+    (inst break vm:pending-interrupt-trap)))
+
+
 (define-vop (halt)
   (:generator 1
     (inst break vm:halt-trap)))