diff --git a/ChangeLog b/ChangeLog
index 807e152..57b5da9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,7 @@
 	  feature request 1502032)
 	* Added new 'database_attrs' option
 	* configure.in: fixed compilation with selinux
+	* src/conf_lex.l, src/db_lex.l: fixed definition of YYDEBUG
 
 2013-05-18	Hannes von Haugwitz <hannes@vonhaugwitz.com>
 	* configure.in: removed check for 'libcrypt'
diff --git a/src/conf_lex.l b/src/conf_lex.l
index 229415f..b1e09df 100644
--- a/src/conf_lex.l
+++ b/src/conf_lex.l
@@ -12,7 +12,7 @@ EX      [" "\t]*
 
 %{
 
-#define YYDEBUG
+#define YYDEBUG 1
 
 /*
  * Copyright (C) 1999-2002,2004-2006,2010-2013 Rami Lehti, Pablo
diff --git a/src/db_lex.l b/src/db_lex.l
index 50fe069..ef1f107 100644
--- a/src/db_lex.l
+++ b/src/db_lex.l
@@ -22,8 +22,8 @@ extern YYSTYPE yylval;
 
 /* aide, Advanced Intrusion Detection Environment
  *
- * Copyright (C) 1999-2002,2005,2010 Rami Lehti,Pablo Virolainen,
- * Richard van den Berg
+ * Copyright (C) 1999-2002,2005,2010,2013 Rami Lehti,Pablo Virolainen,
+ * Richard van den Berg, Hannes von Haugwitz
  * $Header$
  *
  * This program is free software; you can redistribute it and/or
@@ -45,7 +45,7 @@ extern YYSTYPE yylval;
 #define YY_DECL int db_scan(void)
 
 
-#define YYDEBUG
+#define YYDEBUG 1
 
 #include "aide.h"
 #include "conf_yacc.h"