diff --git a/cores/arduino/Tone.cpp b/cores/arduino/Tone.cpp index 1bfb3e379..2ad0fc4b9 100644 --- a/cores/arduino/Tone.cpp +++ b/cores/arduino/Tone.cpp @@ -349,7 +349,7 @@ void tone(uint8_t _pin, unsigned int frequency, unsigned long duration) // Calculate the toggle count if (duration > 0) { - toggle_count = 2 * frequency * duration / 1000; + toggle_count = 2 * (unsigned long)frequency * duration / 1000; } else {