diff --git a/libraries/ArduinoOTA/ArduinoOTA.cpp b/libraries/ArduinoOTA/ArduinoOTA.cpp
index e3f13cfe35..24be99d374 100644
--- a/libraries/ArduinoOTA/ArduinoOTA.cpp
+++ b/libraries/ArduinoOTA/ArduinoOTA.cpp
@@ -149,7 +149,7 @@ int ArduinoOTAClass::parseInt(){
   for(index = 0; index < sizeof(data); ++index){
     value = _udp_ota->peek();
     if(value < '0' || value > '9'){
-      data[index++] = '\0';
+      data[index] = '\0';
       return atoi(data);
     }
     data[index] = _udp_ota->read();