diff --git a/wled00/xml.cpp b/wled00/xml.cpp
index 84f70bbc..e8c7e6ca 100644
--- a/wled00/xml.cpp
+++ b/wled00/xml.cpp
@@ -274,7 +274,7 @@ void appendGPIOinfo() {
   #endif
   oappend(SET_F(";"));
 
-  char dt_pins[30];
+  char dt_pins[48]; // fix warning: output 45 bytes into a destination of size 30
   #if defined(ESP8266) && !defined(ARDUINO_ESP8266_ESP01)
   sprintf(dt_pins, "d.dt_pins=[%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d];", D0, D1, D2, D3, D4, D5, D6, D7, D8, hardwareRX, hardwareTX);
   #else