diff --git a/simulator/rdtemp/cli.ino b/simulator/rdtemp/cli.ino
index e96c36b..a409901 100644
--- a/simulator/rdtemp/cli.ino
+++ b/simulator/rdtemp/cli.ino
@@ -116,7 +116,7 @@ switch(key) {
   case 'h':     param->temp_maxi = value;     break;
   case 'l':     param->temp_mini = value;     break;
 
-  default:    prtln("GNI ?");
+  default:    prtln("GNI ?");                 break;
   }
 
 }
diff --git a/simulator/rdtemp/rdtemp.ino b/simulator/rdtemp/rdtemp.ino
index fe404cd..9514e4e 100644
--- a/simulator/rdtemp/rdtemp.ino
+++ b/simulator/rdtemp/rdtemp.ino
@@ -132,7 +132,8 @@ void loop() {
           controle_ventilo(0);
           break;
       default:
-          prtln("M bad control code");
+          prt("M "); prt(key);
+          prtln(" bad control code");
           break;          
       }
  }