diff --git a/examples/README b/examples/README
index 58c58d2..682aaf9 100644
--- a/examples/README
+++ b/examples/README
@@ -3,8 +3,11 @@
 the ASN.1 modules, as well as examples of these formats and the sample
 convertor's output (generated by `make`).
 
-To regenerate the .asn1 files, do `rm *.asn1; make`.
+To regenerate the .asn1 files from the original RFC texts, do `rm *.asn1; make`.
 
 To compile the files using asn1c, try
 
 	../asn1c/asn1c -P rfc3280-*.asn1
+
+The ./sample.source.PKIX1 directory contains the X.509 certificate decoder.
+