diff --git a/src/EntityGraph.cs b/src/EntityGraph.cs
index f36c0a7..47c0bd9 100644
--- a/src/EntityGraph.cs
+++ b/src/EntityGraph.cs
@@ -227,6 +227,7 @@ namespace DCFApixels.DragonECS
             {
                 _graph = arc;
                 _graph.World.AddListener(this);
+                IntHash.InitFor(_graph.World.Capacity);
             }
             public void Destroy()
             {