reheaderization

diff --git a/skeletons/NULL.h b/skeletons/NULL.h
index 0c07ffe..64c02f7 100644
--- a/skeletons/NULL.h
+++ b/skeletons/NULL.h
@@ -5,7 +5,7 @@
 #ifndef	ASN_TYPE_NULL_H
 #define	ASN_TYPE_NULL_H
 
-#include <constr_TYPE.h>
+#include <asn_application.h>
 
 /*
  * The value of the NULL type is meaningless: see BOOLEAN if you want to