diff --git a/src/Attributes/QueryAttributes.cs b/src/Attributes/QueryAttributes.cs
index 8f98e53..c68b491 100644
--- a/src/Attributes/QueryAttributes.cs
+++ b/src/Attributes/QueryAttributes.cs
@@ -4,8 +4,9 @@ namespace DCFApixels.DragonECS
 {
     [AttributeUsage(AttributeTargets.Field, Inherited = false, AllowMultiple = false)]
     public sealed class IncAttribute : Attribute { }
-
     [AttributeUsage(AttributeTargets.Field, Inherited = false, AllowMultiple = false)]
     public sealed class ExcAttribute : Attribute { }
+    [AttributeUsage(AttributeTargets.Field, Inherited = false, AllowMultiple = false)]
+    public sealed class OptAttribute : Attribute { }
 }