diff --git a/zebra/ChangeLog b/zebra/ChangeLog
index d328feb..62287d0 100644
--- a/zebra/ChangeLog
+++ b/zebra/ChangeLog
@@ -6,6 +6,7 @@
 	* if_{proc,sysctl}.c: Make ifstat_update_* definitions and return values
 	  consistent with each other and their declarations, ie: 
 	  (void) (*) (void).
+	* rtadv.h: depends on interface.h, so should include it.
 
 2006-08-04 Paul Jakma <paul.jakma@sun.com>
 
diff --git a/zebra/rtadv.h b/zebra/rtadv.h
index c2855a3..0a65df2 100644
--- a/zebra/rtadv.h
+++ b/zebra/rtadv.h
@@ -23,6 +23,8 @@
 #ifndef _ZEBRA_RTADV_H
 #define _ZEBRA_RTADV_H
 
+#include "zebra/interface.h"
+
 /* Router advertisement prefix. */
 struct rtadv_prefix
 {