--- arping.c
+++ arping.c
@@ -335,8 +335,8 @@ void set_device_broadcast(char *device, unsigned char *ba, size_t balen)
 		exit(2);
 	}
 
-	for (p = ba, ch = 0; p < ba + balen; p++, ch += 3)
-		*p++ = strtoul(brdcast->value + ch * 3, NULL, 16);
+	for (p = ba, ch = 0; p < ba + balen; ch += 3)
+		*p++ = strtoul(brdcast->value + ch, NULL, 16);
 
 	return;
 }
-- 
1.7.1