diff --git a/hardware/arduino/cores/arduino/wiring.c b/hardware/arduino/cores/arduino/wiring.c
index 9cb6cf021..eb2d44001 100755
--- a/hardware/arduino/cores/arduino/wiring.c
+++ b/hardware/arduino/cores/arduino/wiring.c
@@ -189,6 +189,8 @@ void init()
 	// this is better for motors as it ensures an even waveform
 	// note, however, that fast pwm mode can achieve a frequency of up
 	// 8 MHz (with a 16 MHz clock) at 50% duty cycle
+        
+        TCCR1B = 0;
 
 	// set timer 1 prescale factor to 64
 	sbi(TCCR1B, CS11);