diff --git a/setup/sql/pgsql_droptables.inc.php b/setup/sql/pgsql_droptables.inc.php
index 5031405cd3..ac711b2ff7 100644
--- a/setup/sql/pgsql_droptables.inc.php
+++ b/setup/sql/pgsql_droptables.inc.php
@@ -27,6 +27,7 @@
   $phpgw_setup->db->query("DROP TABLE phpgw_hooks");
   $phpgw_setup->db->query("DROP TABLE profiles");
   $phpgw_setup->db->query("DROP TABLE addressbook");
+  $phpgw_setup->db->query("drop sequence addressbook_id_seq");
   $phpgw_setup->db->query("drop sequence phpgw_addressbook_id_seq");
   $phpgw_setup->db->query("DROP TABLE phpgw_addressbook");
   $phpgw_setup->db->query("DROP TABLE phpgw_addressbook_extra");