diff --git a/lib/database_rewinder.rb b/lib/database_rewinder.rb
index 8c73cf2..b674a7f 100644
--- a/lib/database_rewinder.rb
+++ b/lib/database_rewinder.rb
@@ -22,6 +22,8 @@ def create_cleaner(connection_name)
     end
 
     def [](connection)
+      init unless defined? @cleaners
+
       @cleaners.detect {|c| c.connection_name == connection} || create_cleaner(connection)
     end