1 files changed, 3 insertions, 0 deletions
diff --git a/cores/arduino/WProgram.h b/cores/arduino/WProgram.h
index fc14923..f5d3e29 100755
--- a/cores/arduino/WProgram.h
+++ b/cores/arduino/WProgram.h
@@ -19,6 +19,9 @@ uint16_t makeWord(byte h, byte l);
 
 unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
 
+void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
+void noTone(uint8_t _pin);
+
 // WMath prototypes
 long random(long);
 long random(long, long);