diff --git a/ScriptCoreGenerator/SyntaxNodeExtensions.cs b/ScriptCoreGenerator/SyntaxNodeExtensions.cs
index 42c4ed8..c386fb7 100644
--- a/ScriptCoreGenerator/SyntaxNodeExtensions.cs
+++ b/ScriptCoreGenerator/SyntaxNodeExtensions.cs
@@ -1,4 +1,6 @@
-using System;
+#nullable enable
+
+using System;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;