diff --git includes/update.inc includes/update.inc
index 70861a6..38be2a8 100644
--- includes/update.inc
+++ includes/update.inc
@@ -542,6 +542,11 @@ function update_fix_d7_requirements() {
        ),
       'primary key' => array('value'),
     );
+    // some Drupal 6 installs still have an unused sequences tables if they
+    // were upgraded from D5, ditch it
+    if (db_table_exists('sequences')) {
+      db_drop_table('sequences');
+    }
     db_create_table('sequences', $schema['sequences']);
     // Initialize the table with the maximum current increment of the tables
     // that will rely on it for their ids.