diff --git a/include/QF/scene/entity.h b/include/QF/scene/entity.h
index 2345ac3e2..373c81f1a 100644
--- a/include/QF/scene/entity.h
+++ b/include/QF/scene/entity.h
@@ -113,9 +113,10 @@ ENTINLINE
 void
 EntQueue_AddEntity (entqueue_t *queue, entity_t *ent, int queue_num)
 {
-	if (!set_is_member (queue->queued_ents, ent->id)) {
+	int         id = -ent->id;//FIXME use ~
+	if (!set_is_member (queue->queued_ents, id)) {
 		// entity ids are negative (ones-complement)
-		set_add (queue->queued_ents, -ent->id);//FIXME use ~
+		set_add (queue->queued_ents, id);
 		DARRAY_APPEND (&queue->ent_queues[queue_num], ent);
 	}
 }