diff --git a/Speckle.InterfaceGenerator/AutoInterfaceGenerator.cs b/Speckle.InterfaceGenerator/AutoInterfaceGenerator.cs
index 818cb7c..30cdfba 100644
--- a/Speckle.InterfaceGenerator/AutoInterfaceGenerator.cs
+++ b/Speckle.InterfaceGenerator/AutoInterfaceGenerator.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -145,6 +145,11 @@ public class AutoInterfaceGenerator : ISourceGenerator
         var interfaceName = InferInterfaceName(implTypeSymbol, attributeData);
         var visibilityModifier = InferVisibilityModifier(implTypeSymbol, attributeData);
 
+        //https://stackoverflow.com/questions/55492214/the-annotation-for-nullable-reference-types-should-only-be-used-in-code-within-a fix for nullable
+        if (implTypeSymbol.NullableAnnotation == NullableAnnotation.Annotated)
+        {
+            codeWriter.WriteLine("#nullable enable");
+        }
         codeWriter.WriteLine("namespace {0}", namespaceName);
         codeWriter.WriteLine("{");
 
@@ -163,6 +168,10 @@ public class AutoInterfaceGenerator : ISourceGenerator
         --codeWriter.Indent;
 
         codeWriter.WriteLine("}");
+        if (implTypeSymbol.NullableAnnotation == NullableAnnotation.Annotated)
+        {
+            codeWriter.WriteLine("#nullable restore");
+        }
 
         codeWriter.Flush();
         stream.Seek(0, SeekOrigin.Begin);