diff --git a/core/modules/migrate_drupal/src/MigrationConfigurationTrait.php b/core/modules/migrate_drupal/src/MigrationConfigurationTrait.php
index 683823296a8f61733a7c2a681d88d105f4fbd218..b566c821677f4b76c60e9ea7630473180f208a0c 100644
--- a/core/modules/migrate_drupal/src/MigrationConfigurationTrait.php
+++ b/core/modules/migrate_drupal/src/MigrationConfigurationTrait.php
@@ -125,8 +125,8 @@ protected function getMigrations($database_state_key, $drupal_version) {
    * @param \Drupal\Core\Database\Connection $connection
    *   The database connection object.
    *
-   * @return int|false
-   *   An integer representing the major branch of Drupal core (e.g. '6' for
+   * @return string|false
+   *   A string representing the major branch of Drupal core (e.g. '6' for
    *   Drupal 6.x), or FALSE if no valid version is matched.
    */
   protected function getLegacyDrupalVersion(Connection $connection) {