diff --git a/script/import_scripts/base.rb b/script/import_scripts/base.rb
index c6255d85314..277c20b1c5b 100644
--- a/script/import_scripts/base.rb
+++ b/script/import_scripts/base.rb
@@ -203,7 +203,7 @@ class ImportScripts::Base
       return true
     end
   ensure
-    connection.exec('DROP TABLE import_ids')
+    connection.exec('DROP TABLE import_ids') unless connection.nil?
   end
 
   def created_user(user)