diff --git a/src/main.cpp b/src/main.cpp
index 7bcea6d..43c9861 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -230,7 +230,7 @@ void onEvent(ev_t ev) {
             }
             // Schedule next transmission
             os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(TX_INTERVAL), do_send);
-            Serial1.println(F("WasTustDu="));
+            Serial1.print(F("WasTustDu="));
             Serial1.println(WasTustDu);
             WasTustDu++;
             PrintTimeDate();