--- list.c.~1.71.~	1970-01-01 10:00:01.000000000 +1000
+++ list.c	2003-10-09 14:58:27.000000000 +1000
@@ -231,6 +231,7 @@
     SCM res = SCM_EOL;
     SCM *lloc = &res;
     SCM arg = SCM_CAR (args);
+    int argnum = 1;
     args = SCM_CDR (args);
     while (!SCM_NULLP (args)) {
       while (SCM_CONSP (arg)) {
@@ -238,9 +239,10 @@
 	lloc = SCM_CDRLOC (*lloc);
 	arg = SCM_CDR (arg);
       }
-      SCM_VALIDATE_NULL_OR_NIL (SCM_ARGn, arg);
+      SCM_VALIDATE_NULL_OR_NIL (argnum, arg);
       arg = SCM_CAR (args);
       args = SCM_CDR (args);
+      argnum++;
     };
     *lloc = arg;
     return res;