diff -ur lacheck-1.26.orig/lacheck.l lacheck-1.26/lacheck.l
--- lacheck-1.26.orig/lacheck.l	2010-12-09 23:25:22.000000000 +0100
+++ lacheck-1.26/lacheck.l	2012-06-19 15:11:14.000000000 +0200
@@ -113,6 +113,8 @@
  *    Initial distribution version.
  */
 
+%option never-interactive
+
 %{ 
 
 #include <stdio.h>
