diff --git a/Scripts/Node.cs b/Scripts/Node.cs
index bd28553..499797c 100644
--- a/Scripts/Node.cs
+++ b/Scripts/Node.cs
@@ -64,7 +64,7 @@ namespace XNode {
         public static NodeGraph graphHotfix;
 
         protected void OnEnable() {
-            graph = graphHotfix;
+            if (graphHotFix != null) graph = graphHotfix;
             graphHotfix = null;
             UpdateStaticPorts();
             Init();
@@ -313,4 +313,4 @@ namespace XNode {
             }
         }
     }
-}
\ No newline at end of file
+}