diff --git a/lib/dns/include/dns/ncache.h b/lib/dns/include/dns/ncache.h
index 5aa9f23f41..0fe8922280 100644
--- a/lib/dns/include/dns/ncache.h
+++ b/lib/dns/include/dns/ncache.h
@@ -44,12 +44,76 @@
  */
 
 #include <isc/lang.h>
+#include <isc/types.h>
+#include <isc/stdtime.h>
+#include <isc/buffer.h>
 
 #include <dns/types.h>
 #include <dns/result.h>
 
 ISC_LANG_BEGINDECLS
 
+isc_result_t
+dns_ncache_add(dns_message_t *message, dns_db_t *cache, dns_dbnode_t *node,
+	       dns_rdatatype_t covers, isc_stdtime_t now,
+	       dns_rdataset_t *addedrdataset);
+/*
+ * Convert the authority data from 'message' into a negative cache
+ * rdataset, and store it in 'cache' at 'node'.
+ *
+ * Note:
+ *	If 'addedrdataset' is not NULL, then it will be attached to the added
+ *	rdataset.  See dns_db_addrdataset() for more details.
+ *
+ * Requires:
+ *	'message' is a valid message with a properly formatting negative cache
+ *	authority section.
+ *
+ *	The requirements of dns_db_addrdataset() apply to 'cache', 'node',
+ *	'now', and 'addedrdataset'.
+ *
+ * Returns:
+ *	ISC_R_SUCCESS
+ *	ISC_R_NOSPACE
+ *
+ *	Any result code of dns_db_addrdataset() is a possible result code
+ *	of dns_ncache_add().
+ */
+
+isc_result_t
+dns_ncache_towire(dns_rdataset_t *rdataset, dns_compress_t *cctx,
+		  isc_buffer_t *target, unsigned int *countp);
+/*
+ * Convert the negative caching rdataset 'rdataset' to wire format,
+ * compressing names as specified in 'cctx', and storing the result in
+ * 'target'.
+ *
+ * Notes:
+ *	The number of RRs added to target will be added to *countp.
+ *
+ * Requires:
+ *	'rdataset' is a valid negative caching rdataset.
+ *
+ *	'rdataset' is not empty.
+ *
+ *	'countp' is a valid pointer.
+ *
+ * Ensures:
+ *	On a return of DNS_R_SUCCESS, 'target' contains a wire format
+ *	for the data contained in 'rdataset'.  Any error return leaves
+ *	the buffer unchanged.
+ *
+ *	*countp has been incremented by the number of RRs added to
+ *	target.
+ *
+ * Returns:
+ *	DNS_R_SUCCESS		- all ok
+ *	DNS_R_NOSPACE		- 'target' doesn't have enough room
+ *
+ *	Any error returned by dns_rdata_towire(), dns_rdataset_next(),
+ *	dns_name_towire().
+ */
+
 ISC_LANG_ENDDECLS
 
 #endif /* DNS_NCACHE_H */