diff --git a/mendel.c b/mendel.c
index e36387d..a05909b 100644
--- a/mendel.c
+++ b/mendel.c
@@ -82,24 +82,24 @@ void io_init(void) {
 	OCR2B = 0;
 
 	#ifdef	TCCR3A
-		TCCR3A = MASK(WGM31) | MASK(WGM30);
-		TCCR3B = MASK(CS30);
+		TCCR3A = MASK(WGM30);
+		TCCR3B = MASK(WGM32) | MASK(CS30);
 		TIMSK3 = 0;
 		OCR3A = 0;
 		OCR3B = 0;
 	#endif
 	
 	#ifdef	TCCR4A
-		TCCR4A = MASK(WGM41) | MASK(WGM40);
-		TCCR4B = MASK(CS40);
+		TCCR4A = MASK(WGM40);
+		TCCR4B = MASK(WGM42) | MASK(CS40);
 		TIMSK4 = 0;
 		OCR4A = 0;
 		OCR4B = 0;
 	#endif
 	
 	#ifdef	TCCR5A
-		TCCR5A = MASK(WGM51) | MASK(WGM50);
-		TCCR5B = MASK(CS50);
+		TCCR5A = MASK(WGM50);
+		TCCR5B = MASK(WGM52) | MASK(CS50);
 		TIMSK5 = 0;
 		OCR5A = 0;
 		OCR5B = 0;