diff --git a/src/wp-includes/theme.php b/src/wp-includes/theme.php
index 39494dfccb..03640c45ff 100644
--- a/src/wp-includes/theme.php
+++ b/src/wp-includes/theme.php
@@ -890,7 +890,7 @@ function get_theme_mods() {
  *
  * @param string      $name    Theme modification name.
  * @param bool|string $default
- * @return string
+ * @return mixed
  */
 function get_theme_mod( $name, $default = false ) {
 	$mods = get_theme_mods();