diff --git a/main.c b/main.c
index e6429a1..bbc7b01 100644
--- a/main.c
+++ b/main.c
@@ -135,7 +135,7 @@ int main()
     MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
     data.willFlag = 0;
     data.MQTTVersion = 4;//3;
-    data.clientID.cstring = (char*)"controllino";
+    data.clientID.cstring = (char*)"controllino_aufspuleinheit";
     data.username.cstring = (char*)"Aufspuleinheit";
     data.password.cstring = (char*)"\0";
     data.keepAliveInterval = 10;