diff --git a/src/wp-includes/class-wp-theme.php b/src/wp-includes/class-wp-theme.php
index a6966351f185f..5034c5ed6d21e 100644
--- a/src/wp-includes/class-wp-theme.php
+++ b/src/wp-includes/class-wp-theme.php
@@ -233,7 +233,7 @@ final class WP_Theme implements ArrayAccess {
 	 * By default the bucket is not cached, so this value is useless.
 	 *
 	 * @since 3.4.0
-	 * @var bool
+	 * @var int
 	 */
 	private static $cache_expiration = 1800;