diff --git a/examples/Makefile.am b/examples/Makefile.am
index 5b856e5..90e2678 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,4 +1,13 @@
 
 dist_bin_SCRIPTS = crfc2asn1.pl clyx2asn1.pl
 
-EXTRA_DIST = *.asn1 rfc*.txt
+ASN1_SOURCE_1 = rfc3280.txt
+ASN1_FILES_1 = rfc3280-PKIX1Explicit88.asn1 rfc3280-PKIX1Implicit88.asn1
+
+all: $(ASN1_FILES_1)
+
+$(ASN1_FILES_1): crfc2asn1.pl $(ASN1_SOURCE_1)
+	./crfc2asn1.pl $(ASN1_SOURCE_1)
+
+EXTRA_DIST = rfc*.txt
+CLEANFILES = *.asn1