diff --git a/examples/sample.source.PKIX1/Makefile b/examples/sample.source.PKIX1/Makefile
index 87827a24d4c238a1c57214f51afa4f8ac8c308a3..9953647c9f3dc4c73ff95c4280717fd7e924c0b0 100644
--- a/examples/sample.source.PKIX1/Makefile
+++ b/examples/sample.source.PKIX1/Makefile
@@ -307,6 +307,8 @@ ASN_MODULE_HEADERS+=OCTET_STRING.h
 ASN_MODULE_SOURCES+=OCTET_STRING.c
 ASN_MODULE_HEADERS+=ber_decoder.h
 ASN_MODULE_SOURCES+=ber_decoder.c
+ASN_MODULE_SOURCES+=ber_codec_prim.c
+ASN_MODULE_HEADERS+=ber_codec_prim.h
 ASN_MODULE_HEADERS+=ber_tlv_length.h
 ASN_MODULE_SOURCES+=ber_tlv_length.c
 ASN_MODULE_HEADERS+=ber_tlv_tag.h