diff --git a/db/migrate/20160217133001_status_deleted.rb b/db/migrate/20160217133001_status_deleted.rb
index b2606312..99301acb 100644
--- a/db/migrate/20160217133001_status_deleted.rb
+++ b/db/migrate/20160217133001_status_deleted.rb
@@ -19,20 +19,25 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class StatusDeleted < ActiveRecord::Migration
+
   def self.cast_integer(colname)
     adapter_name = ActiveRecord::Base.connection.adapter_name.downcase
     case adapter_name
-    when /postgresql/
-      "integer USING CAST(#{colname} AS integer)"
-    else
-      'integer'
+      when /postgresql/
+        'INTEGER USING CASE WHEN TRUE THEN 1 ELSE 0 END'
+      else
+        'integer'
     end
   end
-  
+
   def self.up
+    execute 'ALTER TABLE dmsf_folders ALTER deleted DROP DEFAULT;'
     change_column :dmsf_folders, :deleted, cast_integer(:deleted), :null => false, :default => DmsfFolder::STATUS_ACTIVE
+    execute 'ALTER TABLE dmsf_files ALTER deleted DROP DEFAULT;'
     change_column :dmsf_files, :deleted, cast_integer(:deleted), :null => false, :default => DmsfFile::STATUS_ACTIVE
+    execute 'ALTER TABLE dmsf_file_revisions ALTER deleted DROP DEFAULT;'
     change_column :dmsf_file_revisions, :deleted, cast_integer(:deleted), :null => false, :default => DmsfFileRevision::STATUS_ACTIVE
+    execute 'ALTER TABLE dmsf_links ALTER deleted DROP DEFAULT;'
     change_column :dmsf_links, :deleted, cast_integer(:deleted), :null => false, :default => DmsfLink::STATUS_ACTIVE
   end