diff -Naur sispmctl-2.7-orig/src/sispm_ctl.c sispmctl-2.7/src/sispm_ctl.c

--- sispmctl-2.7-orig/src/sispm_ctl.c	2008-03-17 11:38:32 +0200

+++ sispmctl-2.7/src/sispm_ctl.c	2009-07-23 15:21:20 +0300

@@ -50,7 +50,7 @@

 {

    int  reqtype=0xa1; //USB_DIR_OUT + USB_TYPE_CLASS + USB_RECIP_INTERFACE /*request type*/,

    int  req=0x01;

-   char buffer[6];

+   unsigned char buffer[6];

   if ( usb_control_msg(udev /* handle*/,

 		       reqtype,

@@ -67,8 +67,12 @@

       exit(-5);

   }

-  sprintf(serial_id, "%02x:%02x:%02x:%02x:%02x", buffer[0],buffer[1],

-	  buffer[2],buffer[3],buffer[4]);

+  sprintf(serial_id, "%02x:%02x:%02x:%02x:%02x",

+		  (unsigned int)buffer[0],

+		  (unsigned int)buffer[1],

+		  (unsigned int)buffer[2],

+		  (unsigned int)buffer[3],

+		  (unsigned int)buffer[4]);

   return serial_id;

 }