diff --git a/src/Control/Control.php b/src/Control/Control.php
index ea96a59..c467d37 100644
--- a/src/Control/Control.php
+++ b/src/Control/Control.php
@@ -59,14 +59,6 @@ abstract class Control
    */
   protected ?Obfuscator $obfuscator = null;
 
-  /**
-   * The HTML code that will be inserted before the HTML code of this form control.
-   *
-   * @var string
-   * @deprecated Use class WrapperControl instead.
-   */
-  protected string $prefix = '';
-
   /**
    * The submit-name or name in the generated HTML code of this form control.
    *