diff --git a/ripngd/ripng_zebra.c b/ripngd/ripng_zebra.c
index 7aaa353..6e58259 100644
--- a/ripngd/ripng_zebra.c
+++ b/ripngd/ripng_zebra.c
@@ -184,7 +184,7 @@
 }
 
 void
-ripng_redistribute_routemap_set (int type, char *name)
+ripng_redistribute_routemap_set (int type, const char *name)
 {
   if (ripng->route_map[type].name)
     free (ripng->route_map[type].name);