diff --git a/spec/lib/sequent/support/database_spec.rb b/spec/lib/sequent/support/database_spec.rb
index 03e20db8..9799f668 100644
--- a/spec/lib/sequent/support/database_spec.rb
+++ b/spec/lib/sequent/support/database_spec.rb
@@ -1,4 +1,5 @@
 require 'spec_helper'
+require 'tmpdir'
 
 require 'sequent/support'