diff --git a/VDS/Extensions/UIControl.swift b/VDS/Extensions/UIControl.swift
index e978bed9..761e502d 100644
--- a/VDS/Extensions/UIControl.swift
+++ b/VDS/Extensions/UIControl.swift
@@ -15,4 +15,7 @@ extension UIControl.State {
     
     /// State for Success
     public static var success = UIControl.State(rawValue: 1 << 17)
+    
+    /// State for Success
+    public static var readonly = UIControl.State(rawValue: 1 << 18)
 }