diff --git a/ripngd/ChangeLog b/ripngd/ChangeLog
index f4b6113..7c6176c 100644
--- a/ripngd/ChangeLog
+++ b/ripngd/ChangeLog
@@ -1,3 +1,8 @@
+2005-04-02 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
+
+	* ripng_interface.c: (ripng_interface_delete) After deleting, set
+	  ifp->ifindex to IFINDEX_INTERNAL.
+
 2005-01-30 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
 
 	* ripng_interface.c: (ripng_multicast_join) Save errno before calling
diff --git a/ripngd/ripng_interface.c b/ripngd/ripng_interface.c
index 5d317ee..477bfd7 100644
--- a/ripngd/ripng_interface.c
+++ b/ripngd/ripng_interface.c
@@ -331,6 +331,7 @@
 
   /* To support pseudo interface do not free interface structure.  */
   /* if_delete(ifp); */
+  ifp->ifindex = IFINDEX_INTERNAL;
 
   return 0;
 }