diff --git a/skeletons/xer_support.c b/skeletons/xer_support.c
index 1d0b42c..9e34e69 100644
--- a/skeletons/xer_support.c
+++ b/skeletons/xer_support.c
@@ -4,11 +4,7 @@
  * 	All rights reserved.
  * Redistribution and modifications are permitted subject to BSD license.
  */
-#include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/types.h>
-
+#include <asn_system.h>
 #include <xer_support.h>
 
 /* Parser states */