diff --git a/Upsilon/Binder/BoundBinaryOperator.cs b/Upsilon/Binder/BoundBinaryOperator.cs
index c731c1c..20d5f25 100644
--- a/Upsilon/Binder/BoundBinaryOperator.cs
+++ b/Upsilon/Binder/BoundBinaryOperator.cs
@@ -89,6 +89,10 @@ namespace Upsilon.Binder
             new BoundBinaryOperator(OperatorKind.Inequality, Type.Boolean, Type.Nil, Type.Boolean),
             new BoundBinaryOperator(OperatorKind.Equality, Type.Unknown, Type.Nil, Type.Boolean),
             new BoundBinaryOperator(OperatorKind.Inequality, Type.Unknown, Type.Nil, Type.Boolean),
+
+            // Userdata equality
+            new BoundBinaryOperator(OperatorKind.Equality, Type.UserData, Type.UserData, Type.Boolean),
+            new BoundBinaryOperator(OperatorKind.Inequality, Type.UserData, Type.UserData, Type.Boolean),
         };
 
         public static BoundBinaryOperator Bind(SyntaxKind operatorToken, Type left, Type right)