diff --git a/functions/kirki/kirki-packages/compatibility/src/Field.php b/functions/kirki/kirki-packages/compatibility/src/Field.php
index d18ee44..eccd82f 100644
--- a/functions/kirki/kirki-packages/compatibility/src/Field.php
+++ b/functions/kirki/kirki-packages/compatibility/src/Field.php
@@ -171,6 +171,15 @@ class Field {
 	 */
 	protected $output = array();
 
+	/**
+	 * Compiler variable to hold compiled CSS or related output.
+	 *
+	 * @access protected
+	 * @var mixed
+	 */
+	protected $compiler;
+
+
 	/**
 	 * Use to automatically generate postMessage scripts.
 	 * Not necessary to use if you use 'transport' => 'auto'