diff --git a/lib/dns/include/dns/compress.h b/lib/dns/include/dns/compress.h
new file mode 100644
index 0000000000..fd0e957bb2
--- /dev/null
+++ b/lib/dns/include/dns/compress.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 1999  Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#ifndef DNS_COMPRESS_H
+#define DNS_COMPRESS_H 1
+
+#include <isc/mem.h>
+
+#include <dns/types.h>
+
+#define DNS_COMPRESS_GLOBAL14		0x01	/* "normal" compression. */
+#define DNS_COMPRESS_GLOBAL16		0x02	/* 16-bit global comp. */
+#define DNS_COMPRESS_LOCAL		0x04	/* Local compression. */
+
+/*
+ * XXX  An API for manipulating these structures will be forthcoming.
+ *	Also magic numbers, _init() and _invalidate(), etc.  At that time,
+ *	direct manipulation of the structures will be strongly discouraged.
+ */
+
+struct dns_compress {
+	unsigned int allowed;			/* Allowed methods. */
+	dns_name_t owner_name;			/* For local compression. */
+	/* XXX compression table here */
+};
+
+struct dns_decompress {
+	unsigned int allowed;			/* Allowed methods. */
+	dns_name_t owner_name;			/* For local compression. */
+};
+
+#endif /* DNS_COMPRESS_H */