diff --git a/ChangeLog b/ChangeLog
index 88a23b363..25f7d7230 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,8 @@ ChangeLog
 
 Upcoming version
 [FEATURE] Show additional fields which are registered by other extensions in "Indexed content" function of the backend module
+[BUGFIX]  Make it possible to have multiple "orderBy" parts in the search result query in TYPO3 13
+[TASK]    Add special treatment for the ke_search_premium "Custom Ranking" feature in the search result query "orderBy" part
 [TASK]    Make it possible to add "having" in the search result query
 
 Version 6.1.2, 15 November 2024
diff --git a/Classes/Lib/Db.php b/Classes/Lib/Db.php
index ac5c9cd62..a79ae43b1 100644
--- a/Classes/Lib/Db.php
+++ b/Classes/Lib/Db.php
@@ -21,6 +21,7 @@
 use TYPO3\CMS\Core\Log\Logger;
 use TYPO3\CMS\Core\Log\LogManager;
 use TYPO3\CMS\Core\SingletonInterface;
+use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /***************************************************************
@@ -144,8 +145,38 @@ public function getSearchResultByMySQL()
                 $resultQuery->groupBy($groupParts[0], $groupParts[1]);
             }
             if (!empty($queryParts['ORDERBY'])) {
-                $orderParts = explode(' ', $queryParts['ORDERBY']);
-                $resultQuery->orderBy($orderParts[0], $orderParts[1]);
+                $orderChain = explode(',', $queryParts['ORDERBY']);
+                $count = 0;
+                foreach ($orderChain as $order) {
+                    $orderParts = explode(' ', $order);
+                    $orderField = strtoupper($orderParts[0]);
+                    $orderDirection = strtoupper($orderParts[1] ?? 'ASC');
+                    if ($count == 0) {
+                        if (ExtensionManagementUtility::isLoaded('ke_search_premium')
+                            && ($orderField == 'customranking')) {
+                            // We cast `customranking` to integer because additionalFields in ke_search can only
+                            // be string, so we cannot use an integer field, although it's a numeric value (can also be
+                            // negative).
+                            $resultQuery->getConcreteQueryBuilder()->orderBy(
+                                'CAST(' . $queryBuilder->quoteIdentifier($orderField) . ' AS SIGNED)',
+                                $orderDirection
+                            );
+                        } else {
+                            $resultQuery->orderBy($orderField, $orderDirection);
+                        }
+                    } else {
+                        if (ExtensionManagementUtility::isLoaded('ke_search_premium')
+                            && ($orderField == 'customranking')) {
+                            $resultQuery->getConcreteQueryBuilder()->addOrderBy(
+                                'CAST(' . $queryBuilder->quoteIdentifier($orderField) . ' AS SIGNED)',
+                                $orderDirection
+                            );
+                        } else {
+                            $resultQuery->addOrderBy($orderField, $orderDirection);
+                        }
+                    }
+                    $count++;
+                }
             }
             if (!empty($queryParts['HAVING'])) {
                 $resultQuery->having($queryParts['HAVING']);