diff --git a/metatags_quick.install b/metatags_quick.install
index 2db27a0b9f5f32ba97583a032f663683cd6b4593..e3617df8ad6cc48fc92c88da7eb634bbf0c45a49 100644
--- a/metatags_quick.install
+++ b/metatags_quick.install
@@ -118,7 +118,9 @@ function metatags_quick_update_7004() {
    * first place, that's irrelevant. PostgreSQL seems to support the same
    * syntax, so it should work.
    */
-  db_query('ALTER TABLE {metatags_quick_path_based} DROP PRIMARY KEY, ADD PRIMARY KEY (`id`)');
+  if (db_driver() == 'mysql') {
+    db_query('ALTER TABLE {metatags_quick_path_based} DROP PRIMARY KEY, ADD PRIMARY KEY (`id`)');
+  }
   if (!db_index_exists('metatags_quick_path_based', 'lang_path')) {
     db_add_unique_key('metatags_quick_path_based', 'lang_path', array('lang', 'path'));
   }