diff --git a/aioseop_class.php b/aioseop_class.php
index 39444c315..c91c571a1 100644
--- a/aioseop_class.php
+++ b/aioseop_class.php
@@ -2093,7 +2093,7 @@ function wp_head() {
 	 *
 	 * @return string $url
 	 *
-	 * @since
+	 * @since 2.3.5
 	 */
 	function validate_url_scheme( $url ) {