diff --git a/install.php b/install.php
index d8056c11..c85fff10 100644
--- a/install.php
+++ b/install.php
@@ -9,10 +9,10 @@
     // transaction test.
     $testSQL = rex_sql::factory();
     $testSQL->transactional(static function () {
-        rex_sql::factory()->setQuery('SELECT * rex_user LIMIT 1');
+        rex_sql::factory()->setQuery('SELECT * from rex_user LIMIT 1');
     });
 } catch (Exception $e) {
-    throw new rex_sql_exception('db does not support transactions', $e);
+    throw new rex_exception('db does not support transactions: ' . $e->getMessage(), $e);
 }
 
 // old plugin docs still exists ? -> delete