diff --git a/libraries/joomla/form/fields/plugins.php b/libraries/joomla/form/fields/plugins.php
index 422c289747a64..328137321aaa0 100644
--- a/libraries/joomla/form/fields/plugins.php
+++ b/libraries/joomla/form/fields/plugins.php
@@ -157,4 +157,21 @@ protected function getOptions()
 
 		return array_merge($parentOptions, $options);
 	}
+
+	/**
+	 * Method to get input and also set field readonly.
+	 *
+	 * @return  string  The field input markup.
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	protected function getInput()
+	{
+		if (count($this->options) === 1 && $this->options[0]->text === JText::_('JOPTION_DO_NOT_USE'))
+		{
+			$this->readonly = true;
+		}
+
+		return parent::getInput();
+	}
 }