diff --git a/examples/sample.source.PKIX1/config.h b/examples/sample.source.PKIX1/config.h
index 5385d429..2f6a3921 100644
--- a/examples/sample.source.PKIX1/config.h
+++ b/examples/sample.source.PKIX1/config.h
@@ -8,4 +8,5 @@ extern int opt_debug;
 			__FILE__, __LINE__);	\
 	} while(0)
 
-#define	asn_DEF	asn_DEF_Certificate	/* for ../decoder-template.c */
+/* Which type is the PDU; for ../../skeletons/asn-decoder-template.c */
+#define	asn_DEF	asn_DEF_Certificate