diff --git a/core/includes/common.inc b/core/includes/common.inc
index c16602b..2599c8a 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -1071,7 +1071,7 @@ function format_plural($count, $singular, $plural, array $args = array(), array
  *   \Drupal\Component\Utility\Bytes::parseSize() directly instead.
  */
 function parse_size($size) {
-  return Bootstrap::parseSize($size);
+  return Bytes::parseSize($size);
 }
 
 /**