diff --git a/clutter/clutter-id-pool.c b/clutter/clutter-id-pool.c
index 53c7c6711..c5ecc5949 100644
--- a/clutter/clutter-id-pool.c
+++ b/clutter/clutter-id-pool.c
@@ -115,7 +115,7 @@ clutter_id_pool_lookup (ClutterIDPool *id_pool,
   g_return_val_if_fail (id_pool != NULL, NULL);
   g_return_val_if_fail (id_pool->array != NULL, NULL);
 
-  if (id > id_pool->array->len)
+  if (id >= id_pool->array->len)
     {
       g_warning ("The required ID of %u is outside the ID range; this "
                  "usually implies that the pick() of an actor is not "