diff --git a/Assets/Fungus/Flowchart/Editor/GLDraw.cs b/Assets/Fungus/Flowchart/Editor/GLDraw.cs
index 9c8446cd..cecc93fe 100755
--- a/Assets/Fungus/Flowchart/Editor/GLDraw.cs
+++ b/Assets/Fungus/Flowchart/Editor/GLDraw.cs
@@ -1,5 +1,4 @@
 using UnityEngine;
-using UnityEngine.Assertions.Must;
 using System.Collections;
 using System;