diff --git a/core/Command/Db/ConvertType.php b/core/Command/Db/ConvertType.php
index 6e20acf254b..15b447b0827 100644
--- a/core/Command/Db/ConvertType.php
+++ b/core/Command/Db/ConvertType.php
@@ -340,14 +340,11 @@ class ConvertType extends Command implements CompletionAwareInterface {
 		try {
 			$orderColumns = $table->getPrimaryKeyColumns();
 		} catch (Exception $e) {
-			$orderColumns = [];
-			foreach ($table->getColumns() as $column) {
-				$orderColumns[] = $column->getName();
-			}
+			$orderColumns = $table->getColumns();
 		}
 
 		foreach ($orderColumns as $column) {
-			$query->addOrderBy($column);
+			$query->addOrderBy($column->getName());
 		}
 
 		$insertQuery = $toDB->getQueryBuilder();