diff --git a/ripngd/ripng_debug.h b/ripngd/ripng_debug.h
new file mode 100644
index 0000000..6713a15
--- /dev/null
+++ b/ripngd/ripng_debug.h
@@ -0,0 +1,52 @@
+/*
+ * RIPng debug output routines
+ * Copyright (C) 1998, 1999 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
+#ifndef _ZEBRA_RIPNG_DEBUG_H
+#define _ZEBRA_RIPNG_DEBUG_H
+
+/* Debug flags. */
+#define RIPNG_DEBUG_EVENT   0x01
+
+#define RIPNG_DEBUG_PACKET  0x01
+#define RIPNG_DEBUG_SEND    0x20
+#define RIPNG_DEBUG_RECV    0x40
+#define RIPNG_DEBUG_DETAIL  0x80
+
+#define RIPNG_DEBUG_ZEBRA   0x01
+
+/* Debug related macro. */
+#define IS_RIPNG_DEBUG_EVENT  (ripng_debug_event & RIPNG_DEBUG_EVENT)
+
+#define IS_RIPNG_DEBUG_PACKET (ripng_debug_packet & RIPNG_DEBUG_PACKET)
+#define IS_RIPNG_DEBUG_SEND   (ripng_debug_packet & RIPNG_DEBUG_SEND)
+#define IS_RIPNG_DEBUG_RECV   (ripng_debug_packet & RIPNG_DEBUG_RECV)
+#define IS_RIPNG_DEBUG_DETAIL (ripng_debug_packet & RIPNG_DEBUG_DETAIL)
+
+#define IS_RIPNG_DEBUG_ZEBRA  (ripng_debug_zebra & RIPNG_DEBUG_ZEBRA)
+
+extern unsigned long ripng_debug_event;
+extern unsigned long ripng_debug_packet;
+extern unsigned long ripng_debug_zebra;
+
+void ripng_debug_init ();
+
+#endif /* _ZEBRA_RIPNG_DEBUG_H */