diff --git a/yasnd.c b/yasnd.c
index 016fcfb..d4c773d 100644
--- a/yasnd.c
+++ b/yasnd.c
@@ -45,6 +45,42 @@ void* allocate_memory(int bytes)
 	return result;
 }
 
+/*
+	Function, that turn off all LPT port pins.
+	This is needed to unlock LPT control circuit, when
+	management computer is just booted
+*/
+void lpt_init()
+{
+	if (ioperm (lpt_port, 3, 1))
+	{
+		log_event("Error: Unlocking the circuit fails due to LPT port access error");
+		// disable LPT port usage
+		lpt_enable=false;
+		return;
+	}
+	// Unlock circuit
+	outb (0, lpt_port);
+}
+
+/*
+	Function, that turn on first LPT port pin and turn off others.
+	This is needed to lock LPT control circuit, when
+	management computer is rebooted
+*/
+void lpt_lock()
+{
+	if (ioperm (lpt_port, 3, 1))
+	{
+		log_event("Error: Locking the circuit fails due to LPT port access error");
+		// disable LPT port usage
+		lpt_enable=false;
+		return;
+	}
+	// Lock circuit
+	outb (1, lpt_port);
+}
+
 void init()
 {
 	// Initialize config parsing library
@@ -110,6 +146,9 @@ void init()
 	// initialize gammu structures
 	if (sms_send_enable)
 		gammu_init();
+	// initialize LPT control circuit
+	if (lpt_enable)
+		lpt_init();
 }
 
 void check_host(int num,host_decl* host)
@@ -136,22 +175,6 @@ void check_host(int num,host_decl* host)
 	host->helper_pid=pid;
 }
 
-/*
-	Function, that turn on first LPT port pin and turn off others.
-	This is needed to lock LPT control circuit, when
-	management computer is rebooted
-*/
-void lpt_lock()
-{
-	if (ioperm (lpt_port, 3, 1))
-	{
-		log_event("Error: LPT port access error");
-		exit(EXIT_FAILURE);
-	}
-	// Lock circuit
-	outb (1, lpt_port);
-}
-
 /*
 	Function, that turn on only one LPT port pin, defined by it argument, wait a second,
 	and turn off all pins. That is enough to reset specified host.