diff --git a/examples/sample.source.PKIX1/Makefile b/examples/sample.source.PKIX1/Makefile
index f123183..0a04ba9 100644
--- a/examples/sample.source.PKIX1/Makefile
+++ b/examples/sample.source.PKIX1/Makefile
@@ -269,6 +269,8 @@
 ASN_MODULE_HEADERS+=IA5String.h
 ASN_MODULE_SOURCES+=IA5String.c
 ASN_MODULE_SOURCES+=INTEGER.c
+ASN_MODULE_HEADERS+=NativeInteger.h
+ASN_MODULE_SOURCES+=NativeInteger.c
 ASN_MODULE_HEADERS+=NumericString.h
 ASN_MODULE_SOURCES+=NumericString.c
 ASN_MODULE_HEADERS+=OBJECT_IDENTIFIER.h