diff --git a/InterfaceGenerator/Attributes.cs b/InterfaceGenerator/Attributes.cs
index 754b8ec..60b6387 100644
--- a/InterfaceGenerator/Attributes.cs
+++ b/InterfaceGenerator/Attributes.cs
@@ -12,6 +12,7 @@ internal class Attributes
         public const string InterfaceNamePropName = "Name";
         
         public static readonly string AttributesSourceCode = $@"
+// <auto-generated />
 
 using System;
 using System.Diagnostics;
diff --git a/InterfaceGenerator/AutoInterfaceGenerator.cs b/InterfaceGenerator/AutoInterfaceGenerator.cs
index e4ec264..0c9a53a 100644
--- a/InterfaceGenerator/AutoInterfaceGenerator.cs
+++ b/InterfaceGenerator/AutoInterfaceGenerator.cs
@@ -145,6 +145,8 @@ private string GenerateInterfaceCode(INamedTypeSymbol implTypeSymbol, AttributeD
             var interfaceName = InferInterfaceName(implTypeSymbol, attributeData);
             var visibilityModifier = InferVisibilityModifier(implTypeSymbol, attributeData);
 
+            codeWriter.WriteLine("// <auto-generated />");
+            codeWriter.WriteLine();
             codeWriter.WriteLine("namespace {0}", namespaceName);
             codeWriter.WriteLine("{");