diff --git a/src/vnet/fib/ip6_fib.c b/src/vnet/fib/ip6_fib.c
index 6d0eca4..06160c5 100644
--- a/src/vnet/fib/ip6_fib.c
+++ b/src/vnet/fib/ip6_fib.c
@@ -589,7 +589,7 @@
   u64 count_by_prefix_length[129];
 } count_routes_in_fib_at_prefix_length_arg_t;
 
-static void
+static int
 count_routes_in_fib_at_prefix_length (clib_bihash_kv_24_8_t * kvp,
                                       void *arg)
 {
@@ -597,11 +597,13 @@
   int mask_width;
 
   if ((kvp->key[2]>>32) != ap->fib_index)
-    return;
+      return (BIHASH_WALK_CONTINUE);
 
   mask_width = kvp->key[2] & 0xFF;
 
   ap->count_by_prefix_length[mask_width]++;
+
+  return (BIHASH_WALK_CONTINUE);
 }
 
 static clib_error_t *