diff --git a/NOVA/nova_dkp.c b/NOVA/nova_dkp.c
index a89edf6e..7335b4d0 100644
--- a/NOVA/nova_dkp.c
+++ b/NOVA/nova_dkp.c
@@ -706,7 +706,7 @@ if ( DKP_TRACE(1) )
 				  "write"
 				: ((uptr->FUNC == FCCY_SEEK) ?
 					  "seek"
-					: "<???>"
+					: "<?\?\?>"
 				  )
 			  )
 		),
@@ -871,7 +871,7 @@ do  {
                   "read"
                 : ((uptr->FUNC == FCCY_WRITE) ?
                       "write"
-                    : "<???>")
+                    : "<?\?\?>")
             ),
             (unsigned) (uptr->CYL),
             (unsigned) (GET_SURF(dkp_ussc, dtype)),
diff --git a/PDP11/pdp11_xq.c b/PDP11/pdp11_xq.c
index 9bb366db..03f7c563 100644
--- a/PDP11/pdp11_xq.c
+++ b/PDP11/pdp11_xq.c
@@ -702,7 +702,7 @@ t_stat xq_show_filters (FILE* st, UNIT* uptr, int32 val, void* desc)
     fprintf(st, "Filters:\n");
     for (i=0; i<XQ_FILTER_MAX; i++) {
       eth_mac_fmt((ETH_MAC*)xq->var->setup.macs[i], buffer);
-      fprintf(st, "  [%2d]: %s\n", i, buffer);
+      fprintf(st, "  [%2d]: %s\n", (int)i, buffer);
     }
     if (xq->var->setup.multicast)
       fprintf(st, "All Multicast Receive Mode\n");
@@ -2073,6 +2073,9 @@ t_stat xq_process_bootrom (CTLR* xq)
       /* set to next bdl (implicit chain) */
       xq->var->rbdl_ba += 12;
       break;
+
+    default:
+      break;
   } /* switch */
 
   /* --------------------------- Done, finish up -----------------------------*/