diff --git a/ghc/rts/Updates.hc b/ghc/rts/Updates.hc
index 0fcd446a62cd0397aee3901f37154c1cf22e8f8c..a74e805a5262b83b24f8252da4445fa34c7a1cb1 100644
--- a/ghc/rts/Updates.hc
+++ b/ghc/rts/Updates.hc
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: Updates.hc,v 1.4 1999/01/14 14:35:04 simonm Exp $
+ * $Id: Updates.hc,v 1.5 1999/01/14 14:43:46 simonm Exp $
  *
  * Code to perform updates.
  *
@@ -173,7 +173,7 @@ STGFUN(PAP_entry)
   /* 
    * Check for stack overflow.
    */
-  STK_CHK(Words,PAP_entry,R1.p,1,);
+  STK_CHK_NP(Words,1,);
   Sp -= Words;
 
   TICK_ENT_PAP(pap);