diff --git a/sim_console.c b/sim_console.c
index 6a0674b7..2eb20859 100644
--- a/sim_console.c
+++ b/sim_console.c
@@ -437,7 +437,7 @@ if (*cptr == 0) {                                       /* show all */
 while (*cptr != 0) {
     cptr = get_glyph (cptr, gbuf, ',');                 /* get modifier */
     if ((shptr = find_shtab (show_con_tab, gbuf)))
-        shptr->action (st, dptr, uptr, shptr->arg, cptr);
+        shptr->action (st, dptr, uptr, shptr->arg, NULL);
     else return SCPE_NOPARAM;
     }
 return SCPE_OK;