diff --git a/scp.c b/scp.c
index a2854d4d..0777bc22 100644
--- a/scp.c
+++ b/scp.c
@@ -3444,7 +3444,7 @@ do {
         }
     else
         stat = SCPE_UNK;                                /* bad cmd given */
-    sim_debug (SIM_DBG_DO, sim_dflt_dev, "Command '%s', Result: 0x%X - %s\n", cmdp->name, stat, sim_error_text (stat));
+    sim_debug (SIM_DBG_DO, sim_dflt_dev, "Command '%s', Result: 0x%X - %s\n", cmdp ? cmdp->name : "", stat, sim_error_text (stat));
     echo = sim_do_echo;                                 /* Allow for SET VERIFY */
     stat_nomessage = stat & SCPE_NOMESSAGE;             /* extract possible message supression flag */
     stat_nomessage = stat_nomessage || (!sim_show_message);/* Apply global suppression */