diff --git a/UpdatePTUDevCtrl/worker.h b/UpdatePTUDevCtrl/worker.h
index e0b2c49..ccc3685 100644
--- a/UpdatePTUDevCtrl/worker.h
+++ b/UpdatePTUDevCtrl/worker.h
@@ -35,12 +35,13 @@
     ! U0003: Update finished but FAILed.
  */
 
-#define _ISMAS_DONE         "U0001" // 100%, Check: Resultcode: 0
-#define _ISMAS_SET_WAIT_OK  "U0002" // empty WAIT-button (""), ResultCode: 0
-#define _ISMAS_FAILURE      "U0003" // FAIL
-#define _ISMAS_CONTINUE     "U0010" // %-values: Update laeuft, Resultcodes entsprechend laufender Schritt
-#define _ISMAS_RESET_WAIT   "ISMAS" // reset WAIT-button to "WAIT"
-#define _ISMAS_TEST_TRIGGER "U0099" // check the WAIT-button
+#define _ISMAS_DONE                 "U0001" // 100%, Check: Resultcode: 0
+#define _ISMAS_SET_WAIT_OK          "U0002" // empty WAIT-button (""), ResultCode: 0
+#define _ISMAS_NO_UPDATE_NECESSARY  "M0100" // empty WAIT-button (""), ResultCode: 0
+#define _ISMAS_FAILURE              "U0003" // FAIL
+#define _ISMAS_CONTINUE             "U0010" // %-values: Update laeuft, Resultcodes entsprechend laufender Schritt
+#define _ISMAS_RESET_WAIT           "ISMAS" // reset WAIT-button to "WAIT"
+#define _ISMAS_TEST_TRIGGER         "U0099" // check the WAIT-button
 
 #define _STARTED                                    (1)
 #define _CHECK_ISMAS_TRIGGER                        (2)