Index: generic/nsf.c
===================================================================
diff -u -r10f06c20b9fe60805fd945e7caa4133784fa62ad -r6f3bbd8fb0eecf44cdeb730de9a710c2f1411165
--- generic/nsf.c	(.../nsf.c)	(revision 10f06c20b9fe60805fd945e7caa4133784fa62ad)
+++ generic/nsf.c	(.../nsf.c)	(revision 6f3bbd8fb0eecf44cdeb730de9a710c2f1411165)
@@ -34660,7 +34660,7 @@
 
     Tcl_ListObjLength(interp, varList, &length);
     for (i = 0; i < length; i++) {
-      Tcl_ListObjIndex(interp, varList, (TCL_SIZE_T)i, &element);
+      Tcl_ListObjIndex(interp, varList, i, &element);
       if (VarExists(interp, object, ObjStr(element), NULL, NSF_VAR_REQUIRE_DEFINED)) {
         Tcl_ListObjAppendElement(interp, okList, element);
       } else {