diff --git a/yasnd.c b/yasnd.c
index 2a0261d..2702fe5 100644
--- a/yasnd.c
+++ b/yasnd.c
@@ -207,12 +207,12 @@ void reset_pin(int pin_num)
 	{
 		if (pin_num==0)
 			return; // there is no LPT control for target host
-		if (pin_num<0 || pin_num>8)
+		if (pin_num<2 || pin_num>8)
 		{
 			log_event("Error: incorrent LPT pin number");
 			return;
 		}
-		int pins = 1<<(pin_num);
+		int pins = 1<<(pin_num-1);
 		if (ioperm (lpt_port, 3, 1))
 		{
 			log_event("Error: LPT port access error");