diff --git a/skeletons/NULL.h b/skeletons/NULL.h
new file mode 100644
index 0000000..14f5ffa
--- /dev/null
+++ b/skeletons/NULL.h
@@ -0,0 +1,19 @@
+/*-
+ * Copyright (c) 2003 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef	_NULL_H_
+#define	_NULL_H_
+
+#include <constr_TYPE.h>
+
+typedef struct NULL_s {
+	int value;
+} NULL_t;
+
+extern asn1_TYPE_descriptor_t asn1_DEF_NULL;
+
+der_type_encoder_f NULL_encode_der;
+asn_struct_print_f NULL_print;
+
+#endif	/* _NULL_H_ */